Number 20 facts
The even number 20 is spelled 🔊, and written in words: twenty. The ordinal number 20th is said 🔊 and written as: twentieth. Phone prefix +20 or 0020. The meaning of the number 20 in Maths: Is it Prime? Factorization and prime factors tree. The square root and cube root of 20. What is 20 in computer science, numerology, codes and images, photo art, writing and naming in other languages. Other interesting facts, news related to 20. ‹‹ 19 21 ››
Interesting facts about the number 20

Asteroids
- (20) Massalia is asteroid number 20. It was discovered by A. de Gasparis from Obs. Capodimonte Astronomical on 9/19/1852.
Aircrafts and flights
- 01/18/1960 the Capital Airlines plane, flight number 20, Vickers Viscount 745D crashed in Holdcroft, Virginia, US 46 passengers and 4 crew members died.
Areas, mountains and surfaces
- The total area of Ireland is 32,595 square miles (84,421 square km). Country Ireland and United Kingdom (Northern Ireland). 20th largest island in the world.
Astrology
- It is one of the lucky numbers for the zodiac sign Aquarius.
- What is astrology and what is it for?
Biology
- It is the number of teeth in the deciduous dentition or milk teeth, it is 20.
Distances
- There is a 13 miles (20 km) direct distance between Abū Ghurayb (Iraq) and Baghdad (Iraq).
- There is a 13 miles (20 km) direct distance between Álvaro Obregón (Mexico) and Ciudad Nezahualcoyotl (Mexico).
- There is a 20 miles (32 km) direct distance between Álvaro Obregón (Mexico) and Ecatepec (Mexico).
- There is a 20 miles (31 km) direct distance between Bucheon-si (South Korea) and Seongnam-si (South Korea).
- More distances ...
- There is a 13 miles (20 km) direct distance between Delhi (India) and Ghāziābād (India).
- There is a 13 miles (20 km) direct distance between Depok (Indonesia) and Jakarta (Indonesia).
- There is a 20 miles (32 km) direct distance between Depok (Indonesia) and Tangerang (Indonesia).
- There is a 20 miles (32 km) direct distance between Incheon (South Korea) and Suwon-si (South Korea).
- There is a 20 miles (32 km) direct distance between Kalyān (India) and Mumbai (India).
Games
- Pokémon Raticate (Ratta) is a pokémon number # 020 of the National Pokédex. Raticate is a normal type Pokémon in the first generation. It is a Field Egg group Pokémon. Raticate's other indexes are Teselia index 060 , Johto index 018 .
History and politics
- ISO 3166 country codes for Andorra are AD, AND, 020 and internet top-level domain is .ad
- United Nations Security Council Resolution number 20, adopted 10 March 1947. Review of report by the Atomic Energy Commission. Resolution text.
In other fields
- September 20th - World Paella Day. September 20th is celebrated as World Paella Day, in recognition of a universal and delicious dish originating in Valencia (Spain). The 20th of September has been chosen to commemorate the paella, coinciding with the harvest of the main ingredient with which it is made: rice, the initiative comes from the City Council of Valencia and other local Valencian entities. Paella is a typical dish of humble origins but which has become so international that it reaches every corner of the planet, and is known worldwide. Originally, paella was a country dish that Valencian peasants prepared with ingredients available in the region, such as rice, rabbit, snails and vegetables. Over time, paella has become more versatile, and numerous variations have been created based on regional ingredients and personal preferences. Paella is typically cooked outdoors over an open fire or a wide, flat heat source. The rice is cooked in the broth and ingredients are added at the appropriate time so that everything cooks evenly. It is usually served in the same paella pan in which it was cooked.
- There are 20 perfect interlingual homographs (words that share the same spelling and meaning in French, English, German, Italian, Spanish, etc...): album, diesel, embargo, gangster, hotel, jazz, jockey, karate, laser, libido, mafia, matador, motel, paranoia, radar, radio, revolver, sauna, taxi, telex, virus, yoga. - G. Sarcone
- 20 lustrums is a century.
- In Japanese tradition, the age of majority is set at 20 years.
Jokes
- What is that thing that measures about 20 cm?
The toothbrush.
Mathematics
- 20 is the smallest number that cannot be either prefixed or followed by one digit to form a prime
- 20 is the number of rooted trees with 6 vertices.
Mobile and telephony
- Number 20 or +20 or 0020 is a dial the international call prefix for Egypt. (00/+) is dial the international call prefix.
Music
- 'Matchbox Twenty' (also known as MB20, MBT, Matchbox Twenty and originally as Matchbox 20) is an American alternative rock band originally from Orlando, Florida. When Paul Douchette was working in a restaurant, he served a customer with patches on his clothes and could only read the word Matchbox. 20 was the number seen on this character's shirt.
- '20 Margaritas' is a song by the country music duo Big & Rich.
- '20 Good Reasons ', in Spanish '20 good reasons', was the first single from Thirsty Merc's second album Slideshows.
- '20 Block ', in Spanish '20 Block', is a song by the American pop punk band A Loss for Words (formerly Last Ride).
- '20 Size 'is a song by the Scottish post-rock band Mogwai.
Science
- Calcium is the chemical element in the periodic table that has the symbol Ca and atomic number 20.
Sports
- The best athletes to wear number 20
Barry Sanders, NFL; Lou Brock, MLB; Mike Schmidt, MLB; Frank Robinson, MLB; Tony Stewart, NASCAR; Luc Robitaille, NHL; Ed Reed, NFL; Rob Niedermayer, NHL; Josh Gibson, baseball
Please write us
If you know something interesting about the number 20 or any natural number (positive integer), please write to us.What is 20 in other units
The number 20 converted to a Mayan number is |
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Decimal and Mayan number conversions. |
Weight conversion
20 kilograms (kg) = 44.1 pounds (lbs)
20 pounds (lbs) = 9.1 kilograms (kg)
Length conversion
20 kilometers (km) equals to 12.427 miles (mi).
20 miles (mi) equals to 32.187 kilometers (km).
20 meters (m) equals to 32.187 feet (ft).
20 feet (ft) equals 6.096 meters (m).
20 centimeters (cm) equals to 7.9 inches (in).
20 inches (in) equals to 50.8 centimeters (cm).
Temperature conversion
20° Fahrenheit (°F) equals to -6.7° Celsius (°C)
20° Celsius (°C) equals to 68° Fahrenheit (°F)
Power conversion
20 Horsepower (hp) equals to 14.71 kilowatts (kW)
20 kilowatts (kW) equals to 27.20 horsepower (hp)
Codes and images of the number 20
Number 20 morse code: ..--- -----Sign language for number 20:


Number 20 in braille:
Images of the number | |
Image (1) of the number | Image (2) of the number |
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Number 20 infographic![]() |
Year 20 AD
- Hillel the Elder, Talmudic scholar, died.
- Tiberias was built on the Sea of Galilee by Herod Antipas, in honour of Tiberius.
Gregorian, Hebrew, Islamic, Persian and Buddhist Year (Calendar)
Gregorian year 20 is Buddhist year 563.Buddhist year 20 is Gregorian year 523 a. C.
Gregorian year 20 is Islamic year -621 or -620.
Islamic year 20 is Gregorian year 640 or 641.
Gregorian year 20 is Persian year -603 or -602.
Persian year 20 is Gregorian 641 or 642.
Gregorian year 20 is Hebrew year 3780 or 3781.
Hebrew year 20 is Gregorian year 3740 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is the official calendar in Iran and Afghanistan.
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Advanced math operations
Is Prime?
The number 20 is not a prime number. The closest prime numbers are 19, 23.
The 20th prime number in order is 71.
Factorization and factors (dividers)
The prime factors of 20 are 2 * 2 * 5
The factors of 20 are 1, 2, 4, 5, 10, 20.
Total factors 6.
Sum of factors 42 (22).
Prime factor tree
Powers
The second power of 202 is 400.
The third power of 203 is 8.000.
Roots
The square root √20 is 4,472136.
The cube root of 3√20 is 2,714418.
Logarithms
The natural logarithm of No. ln 20 = loge 20 = 2,995732.
The logarithm to base 10 of No. log10 20 = 1,30103.
The Napierian logarithm of No. log1/e 20 = -2,995732.
Trigonometric functions
The cosine of 20 is 0,408082.The sine of 20 is 0,912945.
The tangent of 20 is 2,237161.
Number 20 in Computer Science
Code type | Code value |
---|---|
Port 20/TCP | FTP Protocol (data) - port for transferring FTP data |
Unix time | Unix time 20 is equal to Thursday Jan. 1, 1970, 12:20 a.m. GMT |
IPv4, IPv6 | Number 20 internet address in dotted format v4 0.0.0.20, v6 ::14 |
20 Decimal | = 10100 Binary |
20 Decimal | = 202 Ternary |
20 Decimal | = 24 Octal |
20 Decimal | = 14 Hexadecimal (0x14 hex) |
20 BASE64 | MjA= |
20 MD5 | 98f13708210194c475687be6106a3b84 |
20 SHA1 | 91032ad7bbcb6cf72875e8e8207dcfba80173f7c |
20 SHA224 | 751267062c92e398c3942214b58136f73a4b9e1ca9a214d72d6d5805 |
20 SHA256 | f5ca38f748a1d6eaf726b8a42fb575c3c71f1864a8143301782de13da2d9202b |
20 SHA384 | fd21efb0c2863b1d2460f7e6048d757beb2326c6e1bbee5194826be2c626a9de3bc8d6f2488617e505c960478d3855d0 |
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Numerology 20
More about numerology 20 ...
№ 20 in other languages
Spanish: | 🔊 (número 20) | veinte |
German: | 🔊 (Nummer 20) | zwanzig |
French: | 🔊 (nombre 20) | vingt |
Portuguese: | 🔊 (número 20) | vinte |
Hindi: | 🔊 (संख्या 20) | बीस |
Chinese: | 🔊 (数 20) | 二十 |
Arabian: | 🔊 (عدد 20) | عشرون |
Czech: | 🔊 (číslo 20) | dvacet |
Korean: | 🔊 (번호 20) | 이십 |
Danish: | 🔊 (nummer 20) | tyve |
Hebrew: | (מספר 20) | עשרים |
Dutch: | 🔊 (nummer 20) | twintig |
Japanese: | 🔊 (数 20) | 二十 |
Indonesian: | 🔊 (jumlah 20) | dua puluh |
Italian: | 🔊 (numero 20) | venti |
Norwegian: | 🔊 (nummer 20) | tjue |
Polish: | 🔊 (liczba 20) | dwadzieścia |
Russian: | 🔊 (номер 20) | двадцать |
Turkish: | 🔊 (numara 20) | yirmi |
Thai: | 🔊 (จำนวน 20) | ยี่สิบ |
Ukrainian: | 🔊 (номер 20) | двадцять |
Vietnamese: | 🔊 (con số 20) | hai mươi |
Other languages ... |
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Frequently asked questions about the number 20
How do you write the number 20 in words?
20 can be written as "twenty".
Number 20 in News
NyTimes: More Than 20 Killed Near Aid Distribution Site in Gaza, Health Officials Say
The Palestinians were shot and scores wounded as huge crowds assembled to try and get food from a new aid distribution center. An Israeli military official said soldiers fired warning shots. June 2, 2025 |
The Sydney Morning Herald: Kate and William return to secret Scottish hideaway 20 years on
The couple have left their three children at home for the first overnight working trip since the princess’ cancer diagnosis. April 30, 2025 |
The Sydney Morning Herald: A new name, first-ever birthday party: Man speaks out after 20 years as ‘prisoner’ in childhood home
In his first public comments, the man, who set the house on fire in his desperation to escape, said he wanted justice and was working to “reclaim control” of his future. April 16, 2025 |
NyTimes: Israeli Strike Kills Over 20, Including Children, Gaza Officials Say
The Israeli military said it was targeting a Hamas operative who it said was responsible for planning attacks. Dozens of people were injured in the strike on a Gaza City neighborhood. April 9, 2025 |
France24: More than 20 staffers quit Musk’s DOGE, refusing to ‘dismantle critical public services’
At least 21 tech employees quit Elon Musk's DOGE in a joint resignation letter on Tuesday, refusing to use their expertise to “dismantle critical public services". The employees warned that many of those hired by Musk were political ideologues lacking the necessary skills or experience, noting that this created "significant … Feb. 25, 2025 |