20918832 has 40 divisors (see below), whose sum is σ = 58954560. Its totient is φ = 6338880.

The previous prime is 20918819. The next prime is 20918851. The reversal of 20918832 is 23881902.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20918793 and 20918802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19282 + ... + 20337.

It is an arithmetic number, because the mean of its divisors is an integer number (1473864).

Almost surely, 2^20918832 is an apocalyptic number.

20918832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20918832 is an abundant number, since it is smaller than the sum of its proper divisors (38035728).

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

20918832 is a wasteful number, since it uses less digits than its factorization.

20918832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39641 (or 39635 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20918832 is about 4573.7109659444. The cubic root of 20918832 is about 275.5365041555.

The spelling of 20918832 in words is "twenty million, nine hundred eighteen thousand, eight hundred thirty-two".