the encyclopedia of numbers

All about a specific number


The encyclopedia of natural numbers, random number generators, Romans, primes etc. looks for all the information about the numbers of the sciences but also of the pseudosciences. Scientific information is marked with colors green, blue and brown. The pseudoscientific information (numerology, astrology, ...) is marked with color pink. Read more ...

Random numbers:

Random numbers generate again
(1 - 10) 4
(1 - 100) 27
(1 - 1.000) 829
(1 - 10.000) 9.421
(1 - 100.000) 23.395
(1 - 1.000.000) 626.420
(1 - 10.000.000) 16.829

Today's numbers

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Day of the century (millennium day):

Random number generator

Random number generator from 1 to 10
Random number generator from 1 to 10

Other types of number generators

Divisors of the numbers

Natural numbers and random numbers.

A random number ("al azar" or "aleatorio" in Spanish) is a number in a sequence whose value is unpredictable. In other words, it is the number that has the same probability of being chosen and that the choice of one does not depend on the choice of the other. Random numbers are used in everyday life in games of chance, contests, lotteries, computer animations, cryptography etc. There are randomization studies on the numbers that humans produce thinking that we do it completely randomly, but it is not like that. Humans are very bad at giving random numbers, because there are clear tendencies in humans for the elaboration of skewed sequences and they are related to personal characteristics, previous knowledge or information, etc.

The natural numbers are the first to appear in different civilizations. They allow us to count the elements that are in a set (cardinal number), express the position or order that an element occupies in a set (ordinal number) and identify (differentiate) the different elements of a set. They have no decimals, they are not fractional, and they are always to the right of zero on the real line. They start from one and are infinite. The 1, 2, 3, 4, ... are examples of natural numbers. Whole numbers are like natural numbers, but negative numbers and zero are included. They also do not have decimals and are not fractional.
Positive integers are placed to the right of the number zero on the number line and negative integers are placed to the left of the number zero. So an integer can be negative (-1, -2, -3,…), positive (1, 2, 3, 4, 5,…), or zero (0). Natural numbers 0 1 2 3 4 5 6 7 8 9

Roman numerals and conversions

Roman numerals is a numbering system that was developed and used throughout the Roman Empire. This special system uses some capital letters of the Roman alphabet (I, V, X, L, C, and M) as symbols to represent certain values. Roman numerals More about Roman numerals ...

Numerology calculators

Calculator - The meaning of the name

Numerology calculator for first name, first and last name or only last name.

Calculator - The meaning of the date

Numerology calculator for date of birth, date of event or any other date.
Date:  / /

Prime numbers

A prime number is an integer greater than one, which has exactly two positive divisors, it is only divisible by itself and by unity (1).

List of the first 100 prime numbers:

List of the first 10.000 prime numbers

Random number generator for your web page and JSON

JSON service generator (for IT). Random number JSON generator.
Random number generator for your website.

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