20864732 has 24 divisors (see below), whose sum is σ = 41856864. Its totient is φ = 8914752.

The previous prime is 20864731. The next prime is 20864737. The reversal of 20864732 is 23746802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10178 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (1744036).

Almost surely, 2^20864732 is an apocalyptic number.

It is an amenable number.

20864732 is an abundant number, since it is smaller than the sum of its proper divisors (20992132).

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

20864732 is a wasteful number, since it uses less digits than its factorization.

20864732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2283 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20864732 is about 4567.7929024858. The cubic root of 20864732 is about 275.2987695038.

The spelling of 20864732 in words is "twenty million, eight hundred sixty-four thousand, seven hundred thirty-two".