20359

20359 is a natural number that follows 20358 and precedes 20360. It is an odd number and is not divisible by 3 or 5. In mathematics, 20359 is a prime number, meaning it has no positive divisors other than 1 and itself.

In common numeral systems, its representations include binary 100111110000111 and hexadecimal 0x4F87.

The sum of its decimal digits is 19, giving a digital root of 1. The number is congruent to 1 modulo 9 and to 7 modulo 8; it leaves a remainder of 3 when divided by 7. Its approximate square root is 142.7.

As a prime near 20,000, 20359 is sometimes cited as an example in elementary prime-testing discussions, illustrating that primality checks must test divisors up to the square root.