even, composite · 20th positive integer
The number 20
20 is an even composite number. It is the 20th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 5 |
| Divisors | 1, 2, 4, 5, 10, 20 |
| Binary | 10100 |
| Hexadecimal | 0x14 |
| Roman numeral | XX |
| Digit sum | 2 |
| Properties | even, composite |
Frequently asked
Is 20 a prime number?
No. 20 is composite. Its prime factorization is 2 × 2 × 5.
What are the factors of 20?
The factors (divisors) of 20 are 1, 2, 4, 5, 10, 20.
What is 20 in binary?
20 in binary is 10100. In hexadecimal it's 14.
What is 20 as a Roman numeral?
20 in Roman numerals is XX.
What's the digit sum of 20?
Adding the digits of 20: 2 + 0 = 2.