20366564 has 24 divisors (see below), whose sum is σ = 36506400. Its totient is φ = 9938880.

The previous prime is 20366551. The next prime is 20366579. The reversal of 20366564 is 46566302.

It is a self number, because there is not a number n which added to its sum of digits gives 20366564.

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, 49592 + ... + 50000.

It is an arithmetic number, because the mean of its divisors is an integer number (1521100).

Almost surely, 2^20366564 is an apocalyptic number.

It is an amenable number.

20366564 is a deficient number, since it is larger than the sum of its proper divisors (16139836).

20366564 is a wasteful number, since it uses less digits than its factorization.

20366564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 20366564 is about 4512.9329709181. The cubic root of 20366564 is about 273.0900783758.

The spelling of 20366564 in words is "twenty million, three hundred sixty-six thousand, five hundred sixty-four".