18620564 has 12 divisors (see below), whose sum is σ = 32639124. Its totient is φ = 9295104.

The previous prime is 18620549. The next prime is 18620587. The reversal of 18620564 is 46502681.

It can be written as a sum of positive squares in 2 ways, for example, as 9060100 + 9560464 = 3010^2 + 3092^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18620564.

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, 767 + ... + 6150.

It is an arithmetic number, because the mean of its divisors is an integer number (2719927).

Almost surely, 2^18620564 is an apocalyptic number.

It is an amenable number.

18620564 is a deficient number, since it is larger than the sum of its proper divisors (14018560).

18620564 is a wasteful number, since it uses less digits than its factorization.

18620564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7594 (or 7592 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 18620564 is about 4315.1551536416. The cubic root of 18620564 is about 265.0519134085.

The spelling of 18620564 in words is "eighteen million, six hundred twenty thousand, five hundred sixty-four".