20953912 has 16 divisors (see below), whose sum is σ = 44901360. Its totient is φ = 8980224.

The previous prime is 20953901. The next prime is 20953939. The reversal of 20953912 is 21935902.

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, 187033 + ... + 187144.

It is an arithmetic number, because the mean of its divisors is an integer number (2806335).

Almost surely, 2^20953912 is an apocalyptic number.

It is an amenable number.

20953912 is an abundant number, since it is smaller than the sum of its proper divisors (23947448).

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

20953912 is a wasteful number, since it uses less digits than its factorization.

20953912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374190 (or 374186 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 20953912 is about 4577.5443198291. The cubic root of 20953912 is about 275.6904391766.

The spelling of 20953912 in words is "twenty million, nine hundred fifty-three thousand, nine hundred twelve".