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24 (twenty-four) is the natural number following 23 and preceding 25.

1 In mathematics

It is the factorial of 4 and a composite number, its proper divisors being 1, 22 two is the natural number following 1 and preceding 3. Prefixes for 2 are di- ( Greek) and duo- ( Latin). Evolution of the glyph The glyph we use today in the Western world to represent the number 2 traces its roots back to the Brahmin Indians, who wrot, 33 three is the natural number following 2 and preceding 4. Prefixes for 3 include tri- ( Greek) and tre- Latin. Evolution of the glyph Three is often the largest number written with as many lines as the number represents. Even the Romans tired of writing, 4This article discusses the number Four . Four is also the name of a French commune, Four, Isere. 4 four is the natural number following 3 and preceding 5. Prefixes for 4 include tetra- ( Greek) and quad- ( Latin). Evolution of the glyph Representing 1, 2, 66 six is the natural number following 5 and preceding 7. Prefixes for 6 include hexa- ( Greek) and sex- ( Latin). The SI prefix for 10006 is exa (E), and for its reciprocal atto (a). Evolution of the glyph The evolution of our modern glyph for 6 appears r, 88 eight is the natural number following 7 and preceding 9. Prefixes for 8 include octa- ( Greek) and octo- ( Latin. The SI prefix for 10008 is yotta (Y), and for its reciprocal yocto (y). Evolution of the glyph In the beginning, various groups in India wr and 1212 twelve is the natural number following 11 and preceding 13. In mathematics Twelve is a composite number, its proper divisors being 1, 2, 3, 4 and 6. Twelve is also a highly composite number, the next one being 24. Twelve being the product of three and, making it a highly composite numberA highly composite number is a positive integer which has more divisors than any positive integer below it. The first twenty highly composite numbers are : 1, 2, 4, 6, 12, 24, 36, 48, 60, 120, 180, 240, 360, 720, 840, 1260, 1680, 2520, 5040, 7560 and 1008. Subtracting one from each of its divisors (except 1 and 2, but including itself) yields a prime numberIn mathematics, a prime number or prime for short, is a natural number whose only distinct positive divisors are 1 and itself; otherwise it is called a composite number . Hence a prime number has exactly two divisors. The number 1 is neither prime nor com; 24 is the largest number with this property.

There are 10 solutions to the equation φ(x) = 24, namely 35, 39, 45, 52, 56, 70, 72, 78, 84 and 90. This is more than any integer below 24, making 24 a highly totient number.

24 is a nonagonal number. This number is also the sum of a twin prime (11 + 13). It is a Harshad number and a semi-meandric number.