20925872 has 20 divisors (see below), whose sum is σ = 44230056. Its totient is φ = 9511680.

The previous prime is 20925847. The next prime is 20925881. The reversal of 20925872 is 27852902.

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, 59273 + ... + 59624.

Almost surely, 2^20925872 is an apocalyptic number.

20925872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20925872 is an abundant number, since it is smaller than the sum of its proper divisors (23304184).

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

20925872 is a wasteful number, since it uses less digits than its factorization.

20925872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118916 (or 118910 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20925872 is about 4574.4805169549. The cubic root of 20925872 is about 275.5674102697.

The spelling of 20925872 in words is "twenty million, nine hundred twenty-five thousand, eight hundred seventy-two".