20902868 has 12 divisors (see below), whose sum is σ = 41805792. Its totient is φ = 8958360.

The previous prime is 20902813. The next prime is 20902873. The reversal of 20902868 is 86820902.

20902868 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373238 + ... + 373293.

It is an arithmetic number, because the mean of its divisors is an integer number (3483816).

Almost surely, 2^20902868 is an apocalyptic number.

20902868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20902868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20902868 is a wasteful number, since it uses less digits than its factorization.

20902868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746542 (or 746540 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20902868 is about 4571.9654416892. The cubic root of 20902868 is about 275.4663953311.

The spelling of 20902868 in words is "twenty million, nine hundred two thousand, eight hundred sixty-eight".