20900650 has 48 divisors (see below), whose sum is σ = 41890176. Its totient is φ = 7729920.

The previous prime is 20900609. The next prime is 20900653. The reversal of 20900650 is 5600902.

20900650 = 615² + 616² + ... + 665².

It is not an unprimeable number, because it can be changed into a prime (20900653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56767 + ... + 57133.

It is an arithmetic number, because the mean of its divisors is an integer number (872712).

Almost surely, 2^20900650 is an apocalyptic number.

20900650 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20900650 is a wasteful number, since it uses less digits than its factorization.

20900650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20900650 is about 4571.7228699911. The cubic root of 20900650 is about 275.4566517547.

The spelling of 20900650 in words is "twenty million, nine hundred thousand, six hundred fifty".