20752864 has 96 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 8547840.

The previous prime is 20752843. The next prime is 20752873. The reversal of 20752864 is 46825702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193899 + ... + 194005.

It is an arithmetic number, because the mean of its divisors is an integer number (510300).

Almost surely, 2^20752864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20752864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24494400).

20752864 is an abundant number, since it is smaller than the sum of its proper divisors (28235936).

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

20752864 is a wasteful number, since it uses less digits than its factorization.

20752864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 20752864 is about 4555.5311435660. The cubic root of 20752864 is about 274.8058751190.

The spelling of 20752864 in words is "twenty million, seven hundred fifty-two thousand, eight hundred sixty-four".