20264564 has 24 divisors (see below), whose sum is σ = 38955840. Its totient is φ = 9180864.

The previous prime is 20264551. The next prime is 20264593. The reversal of 20264564 is 46546202.

It is a super-2 number, since 2×20264564² = 821305108220192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4049 + ... + 7544.

It is an arithmetic number, because the mean of its divisors is an integer number (1623160).

Almost surely, 2^20264564 is an apocalyptic number.

It is an amenable number.

20264564 is a deficient number, since it is larger than the sum of its proper divisors (18691276).

20264564 is a wasteful number, since it uses less digits than its factorization.

20264564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11639 (or 11637 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 20264564 is about 4501.6179313665. The cubic root of 20264564 is about 272.6334178195.

The spelling of 20264564 in words is "twenty million, two hundred sixty-four thousand, five hundred sixty-four".