20900976 has 20 divisors (see below), whose sum is σ = 53994312. Its totient is φ = 6966976.

The previous prime is 20900933. The next prime is 20900981. The reversal of 20900976 is 67900902.

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, 217671 + ... + 217766.

Almost surely, 2^20900976 is an apocalyptic number.

It is an amenable number.

20900976 is an abundant number, since it is smaller than the sum of its proper divisors (33093336).

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

20900976 is a wasteful number, since it uses less digits than its factorization.

20900976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435448 (or 435442 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 20900976 is about 4571.7585238068. The cubic root of 20900976 is about 275.4580839016.

The spelling of 20900976 in words is "twenty million, nine hundred thousand, nine hundred seventy-six".