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2. ### 24 (number) - Wikipedia

en.wikipedia.org/wiki/24_(number)

24 is the third nonagonal number.  24's digits in decimal can be manipulated to form two of its factors, as 2 * 4 is 8 and 2 + 4 is 6. In turn 6 * 8 is 48, which is twice 24, and 4 + 8 is 12, which is half 24. 24 is a congruent number, as 24 is the area of a right triangle with a rational number of sides. 24 is a semi-meandric number, where ...

3. ### Numeral prefix - Wikipedia

en.wikipedia.org/wiki/Numeral_prefix

Numeral prefix. Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example: unicycle, bicycle, tricycle (1-cycle, 2-cycle, 3-cycle) dyad, triad (2 parts, 3 parts) biped, quadruped (2 legs, 4 legs)

4. ### Roman numerals - Wikipedia

en.wikipedia.org/wiki/Roman_numerals

The Roman numerals, in particular, are directly derived from the Etruscan number symbols: 𐌠 , 𐌡 , 𐌢 , 𐌣 , and 𐌟 for 1, 5, 10, 50, and 100 (they had more symbols for larger numbers, but it is unknown which symbol represents which number). As in the basic Roman system, the Etruscans wrote the symbols that added to the desired ...

5. ### Names of large numbers - Wikipedia

en.wikipedia.org/wiki/Names_of_large_numbers

This section illustrates several systems for naming large numbers, and shows how they can be extended past vigintillion . Traditional British usage assigned new names for each power of one million (the long scale ): 1,000,000 = 1 million; 1,000,0002 = 1 billion; 1,000,0003 = 1 trillion; and so on. It was adapted from French usage, and is ...

6. ### List of numbers - Wikipedia, the free encyclopedia

en.wikipedia.org/wiki/List_of_numbers

A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.

7. ### Abundant number - Wikipedia

en.wikipedia.org/wiki/Abundant_number

Because 36 is greater than 24, the number 24 is abundant. Its abundance is 36 − 24 = 12. Properties. The smallest odd abundant number is 945. The smallest abundant number not divisible by 2 or by 3 is 5391411025 whose distinct prime factors are 5, 7, 11, 13, 17, 19, 23, and 29 (sequence A047802 in the OEIS).