20752564 has 12 divisors (see below), whose sum is σ = 41505184. Its totient is φ = 8893944.

The previous prime is 20752559. The next prime is 20752583. The reversal of 20752564 is 46525702.

20752564 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

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, 370554 + ... + 370609.

Almost surely, 2^20752564 is an apocalyptic number.

It is an amenable number.

20752564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20752564 is a wasteful number, since it uses less digits than its factorization.

20752564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741174 (or 741172 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 20752564 is about 4555.4982164413. The cubic root of 20752564 is about 274.8045509297.

It can be divided in two parts, 20752 and 564, that added together give a square (21316 = 146²).

The spelling of 20752564 in words is "twenty million, seven hundred fifty-two thousand, five hundred sixty-four".