24 (number)
24 (twenty-four) is the natural number following 23 and preceding 25.
| 24 | |
|---|---|
| Cardinal | twenty-four |
| Ordinal | twenty-fourth |
| Factorization | |
| Roman numeral | XXIV |
| Binary | 11000 |
| Hexadecimal | 18 |
Mathematics
It is the factorial of 4 and a composite number, its proper divisors being 1, 2, 3, 4, 6, 8 and 12, making it a highly composite number, and its factorization is:
This number is also the sum of a twin prime (11 + 13).
Other fields
Twenty-four is:
- The atomic number of chromium.
- The number of hours in a day.
- Usually the number of teeth in a human child's mouth.
- The number of karats in pure gold.
- The number of letters in the Greek alphabet. For this reason, also the number of chapters or "books" in Homer's Oddyssey.
- The total number of major and minor keys in Western tonal music, not counting enharmonic equivalents. Therefore, for collections of pieces written in each key, the number of pieces in such a collection; e.g., Chopin's 24 Preludes.
- The designation of US Interstate 24, a freeway that runs from Tennessee to Illinois.
- The number of letters in the Greek alphabet in its classical and modern form.
- 24, the television series.
- The year AD 24.