The number 20

Representation numerals

Greek numeral

κ

Arabic numeral

٢٠

Roman numeral

XX

Maya numeral


Chinese numeral

二十

Hebrew numeral

כ
Numeral systems
Binary: 10100
Septimal (base 7): 26
Octal: 24
Hexadecimal: 14
Base 24: K
Factorization
20 = 2 × 2 × 5
20 has 6 divisors: 1, 2, 4, 5, 10, 20
Sum of all divisors other than 20: 22
Sums & differences
Sum of 2 squares: 20 = 42 + 22
Difference of 2 squares: 20 = 62 - 42
Goldbach conjecture: 20 = 17 + 3 = 13 + 7
Characteristics
Related primes
The 20th prime number is: 71
Previous prime number: 19 — Next prime number: 23
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