Number 18
Number 18 spell 🔊, write in words: eighteen . Ordinal number 18th is said 🔊 and write: eighteenth. The meaning of number 18 in Maths: Is Prime? Factorization and dividers. The square root and cube root of 18. The meaning in computer science, numerology, codes and images, writing and naming in other languages , other interesting facts, news.
Useful information about number 18
The decimal (Arabic) number 18 converted to a Roman number is XVIII.
Roman and decimal number conversions.
18 kilograms (kg) = 39.7 pounds (lb)
18 pounds (lb) = 8.2 kilograms (kg)
18 kilometers (km) equals to 11.185 miles (mi).
18 miles (mi) equals to 28.968 kilometers (km).
18 meters (m) equals to 28.968 feet (ft).
18 feet (ft) equals 5.486 meters (m).
18 centimeters (cm) equals to 7.1 inches (in).
18 inches (in) equals to 45.7 centimeters (cm).
18° Fahrenheit (°F) equals to -7.8° Celsius (°C)
18° Celsius (°C) equals to 64.4° Fahrenheit (°F)
18 Horsepower (hp) equals to 13.24 kilowatts (kW)
18 kilowatts (kW) equals to 24.48 horsepower (hp)
The number 18 converted to a Mayan number is | |
Decimal and Mayan number conversions. |
Weight conversion
18 kilograms (kg) = 39.7 pounds (lb)
18 pounds (lb) = 8.2 kilograms (kg)
Length conversion
18 kilometers (km) equals to 11.185 miles (mi).
18 miles (mi) equals to 28.968 kilometers (km).
18 meters (m) equals to 28.968 feet (ft).
18 feet (ft) equals 5.486 meters (m).
18 centimeters (cm) equals to 7.1 inches (in).
18 inches (in) equals to 45.7 centimeters (cm).
Temperature conversion
18° Fahrenheit (°F) equals to -7.8° Celsius (°C)
18° Celsius (°C) equals to 64.4° Fahrenheit (°F)
Power conversion
18 Horsepower (hp) equals to 13.24 kilowatts (kW)
18 kilowatts (kW) equals to 24.48 horsepower (hp)
Codes and images of the number 18
Number 18 morse code: .---- ---..Sign language for number 18:
Images of the number | |
Image (1) of the number | Image (2) of the number |
More images, other sizes, codes and colors ... | |
Number 18 infographic |
Gregorian, Hebrew, Islamic, Persian and Buddhist year (calendar)
Gregorian year 18 is Buddhist year 561.Buddhist year 18 is Gregorian year 525 a. C.
Gregorian year 18 is Islamic year -623 or -622.
Islamic year 18 is Gregorian year 639 or 640.
Gregorian year 18 is Persian year -605 or -604.
Persian year 18 is Gregorian 639 or 640.
Gregorian year 18 is Hebrew year 3778 or 3779.
Hebrew year 18 is Gregorian year 3742 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is official in Iran and Afghanistan.
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Mathematics of no. 18
Multiplications
Multiplication table of 18
18 multiplied by two equals 36 (18 x 2 = 36).
18 multiplied by three equals 54 (18 x 3 = 54).
18 multiplied by four equals 72 (18 x 4 = 72).
18 multiplied by five equals 90 (18 x 5 = 90).
18 multiplied by six equals 108 (18 x 6 = 108).
18 multiplied by seven equals 126 (18 x 7 = 126).
18 multiplied by eight equals 144 (18 x 8 = 144).
18 multiplied by nine equals 162 (18 x 9 = 162).
show multiplications by 6, 7, 8, 9 ...
18 multiplied by seven equals 126 (18 x 7 = 126).
18 multiplied by eight equals 144 (18 x 8 = 144).
18 multiplied by nine equals 162 (18 x 9 = 162).
Fractions: decimal fraction and common fraction
Fraction table of 18
Half of 18 is 9 (18 / 2 = 9).
One third of 18 is 6 (18 / 3 = 6).
One quarter of 18 is 4,5 (18 / 4 = 4,5 = 4 1/2).
One fifth of 18 is 3,6 (18 / 5 = 3,6 = 3 3/5).
One sixth of 18 is 3 (18 / 6 = 3).
One seventh of 18 is 2,5714 (18 / 7 = 2,5714 = 2 4/7).
One eighth of 18 is 2,25 (18 / 8 = 2,25 = 2 1/4).
One ninth of 18 is 2 (18 / 9 = 2).
show fractions by 6, 7, 8, 9 ...
One seventh of 18 is 2,5714 (18 / 7 = 2,5714 = 2 4/7).
One eighth of 18 is 2,25 (18 / 8 = 2,25 = 2 1/4).
One ninth of 18 is 2 (18 / 9 = 2).
Calculator
18 | ||||
Advanced math operations
Is Prime?
The number 18 is not a prime number. The closest prime numbers are 17, 19.
18th prime number in order is 61.
Factorization and dividers
Factorization 2 * 3 * 3 = 18
Divisors of number 18 are 1 , 2 , 3 , 6 , 9 , 18
Total Divisors 6.
Sum of Divisors 39.
Powers
The second power of 18^{2} is 324.
The third power of 18^{3} is 5.832.
Roots
The square root √18 is 4,242641.
The cube root of ^{3}√18 is 2,620741.
Logarithms
The natural logarithm of No. ln 18 = log_{e} 18 = 2,890372.
The logarithm to base 10 of No. log_{10} 18 = 1,255273.
The Napierian logarithm of No. log_{1/e} 18 = -2,890372.
Trigonometric functions
The cosine of 18 is 0,660317.The sine of 18 is -0,750987.
The tangent of 18 is -1,137314.
Properties of the number 18
Is a Friedman number: NoIs a Fibonacci number: No
Is a Bell number: No
Is a palindromic number: No
Is a pentagonal number: No
Is a perfect number: No
Number 18 in Computer Science
Code type | Code value |
---|---|
Port 18/TCP, UDP | Message Send Protocol |
Unix time | Unix time 18 is equal to Thursday Jan. 1, 1970, 12:18 a.m. GMT |
IPv4, IPv6 | Number 18 internet address in dotted format v4 0.0.0.18, v6 ::12 |
18 Decimal | = 10010 Binary |
18 Decimal | = 200 Ternary |
18 Decimal | = 22 Octal |
18 Decimal | = 12 Hexadecimal (0x12 hex) |
18 BASE64 | MTg= |
18 MD5 | 6f4922f45568161a8cdf4ad2299f6d23 |
18 SHA1 | 9e6a55b6b4563e652a23be9d623ca5055c356940 |
18 SHA224 | 958d155f6746e8f18d32a710f206d83f272919fdba3df5c5ad4bc4fd |
18 SHA256 | 4ec9599fc203d176a301536c2e091a19bc852759b255bd6818810a42c5fed14a |
18 SHA384 | fdca2073cb2a84421cb63f9aa92c939c8d35359ec9fbc5c06c84ad80b863ed29589adda6f2ee3cf26e277885804848f5 |
More SHA codes related to the number 18 ... |
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Numerology 18
The meaning of the number 8 (eight), numerology 8
Character frequency 8: 1
The number eight (8) is the sign of organization, perseverance and control of energy to produce material and spiritual achievements. It represents the power of realization, abundance in the spiritual and material world. Sometimes it denotes a tendency to sacrifice but also to be unscrupulous.
More about the meaning of the number 8 (eight), numerology 8 ...
The meaning of the number 1 (one), numerology 1
Character frequency 1: 1
Number one (1) came to develop or balance creativity, independence, originality, self-reliance and confidence in the world. It reflects power, creative strength, quick mind, drive and ambition. It is the sign of individualistic and aggressive nature.
More about the meaning of the number 1 (one), numerology 1 ...
Interesting facts about the number 18
Asteroids
- (18) Melpomene is asteroid number 18. It was discovered by J. R. Hind from George Bishop Observatory on 6/24/1852.
Areas, mountains and surfaces
- The total area of Iceland (main island) is 39,315 square miles (101,826 square km). Country Iceland. 18th largest island in the world.
Astrology
- It is one of the lucky numbers for the zodiac sign Gemini.
- What is astrology and what is it for?
Distances between cities
- There is a 18 miles (28 km) direct distance between Delhi (India) and Farīdābād (India).
- There is a 18 miles (28 km) direct distance between Ecatepec (Mexico) and Iztapalapa (Mexico).
- There is a 18 miles (28 km) direct distance between Klang (Malaysia) and Kuala Lumpur (Malaysia).
- There is a 18 miles (28 km) direct distance between Kobe (Japan) and Sakai (Japan).
- There is a 18 miles (28 km) direct distance between Kowloon (Hong Kong) and Shenzhen (China).
Games
History and politics
- Nazi symbol. 18, which means Adolf Hitler. The number is due to the position of the letters in the Latin alphabet: A = 1 and H = 8. The list of evil numbers.
- United Nations Security Council Resolution number 18, adopted 13 February 1947. Creation of a commission relating to armament regulation and reduction. Resolution text.
In other fields
- 18 karat gold – 75% pure gold (750 parts per thousand)
Mathematics
- 18 is the only positive number that is twice the sum of its digits.
Music
- '18 til I Die ', in Spanish '18 until dying' is a rock song written by Bryan Adams and Robert John 'Mutt' Lange. The song's musical style and production were heavily inspired by rock from the 1980s, and its lyrics are about youth.
- '18 Days ', in Spanish '18 days', is a single by the American rock band 'Saving Abel'.
- '18 Video Tapes ', in Spanish '18 videotapes', is a song by country music artist Jason Meadows.
Science
- Argon is the chemical element in the periodic table that has the symbol Ar and atomic number 18.
Sports
- The best athletes to wear number 18
Peyton Manning, NFL; Dave Cowens, NBA; Charlie Joiner, NFL; Denis Savard, NHL; Bobby Labonte, NASCAR
Please write us
If you know something interesting about the number 18 or any natural number (positive integer), please write to us.Number 18 in other languages
How to say or write the number eighteen in Spanish, German, French and other languages.
Spanish: | 🔊 (número 18) | dieciocho |
German: | 🔊 (Anzahl 18) | achtzehn |
French: | 🔊 (nombre 18) | dix-huit |
Portuguese: | 🔊 (número 18) | dezoito |
Chinese: | 🔊 (数 18) | 十八 |
Arabian: | 🔊 (عدد 18) | ثمانية عشر |
Czech: | 🔊 (číslo 18) | osmnáct |
Korean: | 🔊 (번호 18) | 십팔 |
Danish: | 🔊 (nummer 18) | atten |
Hebrew: | (מספר 18) | שמנה עשרה |
Dutch: | 🔊 (nummer 18) | achttien |
Japanese: | 🔊 (数 18) | 十八 |
Indonesian: | 🔊 (jumlah 18) | delapan belas |
Italian: | 🔊 (numero 18) | diciotto |
Norwegian: | 🔊 (nummer 18) | atten |
Polish: | 🔊 (liczba 18) | osiemnaście |
Russian: | 🔊 (номер 18) | восемнадцать |
Turkish: | 🔊 (numara 18) | onsekiz |
Thai: | 🔊 (จำนวน 18) | สิบแปด |
Ukrainian: | 🔊 (номер 18) | вiсiмнадцять |
Vietnamese: | 🔊 (con số 18) | mười tám |
Other languages ... |
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Number 18 in News
France24: French forces face violent protests after crossing into Niger from Burkina Faso
A French military convoy heading to Mali on Saturday ran into more trouble in a town in Niger after being delayed for more than a week by protests in Burkina Faso, with the Nigerien government reporting two deaths and 18 wounded. Nov. 27, 2021 |
The Sydney Morning Herald: The kids aren’t all right: School closures leave lost generation
In south-east Asia, schools have been closed for as long as 18 months due to the pandemic but as some finally reopen, many children will not return. Oct. 2, 2021 |
The Sydney Morning Herald: Taiwan deploys combat aircraft to meet China’s largest ever ‘military aggression’
China sent 18 J-16 and four Su-30 fighter jets, two nuclear-capable H-6 bombers, an anti-submarine aircraft and another 13 planes into Taiwanese airspace on its National Day. Oct. 2, 2021 |
CNN: She flew to Tonga for a weekend, 18 months later she's still stuck there
When British traveler Zoe Stephens flew into the South Pacific island nation of Tonga last March, she was only planning to stay for the weekend. Aug. 18, 2021 |
France24: Chinese court sentences whistleblowing agricultural tycoon to 18 years in prison
A Chinese court sentenced agricultural tycoon Sun Dawu to 18 years in jail on Wednesday for a catalogue of crimes including “provoking trouble” after the outspoken billionaire and grassroots rights supporter was tried in secret. July 28, 2021 |