18613564 has 12 divisors (see below), whose sum is σ = 32628904. Its totient is φ = 9291024.

The previous prime is 18613561. The next prime is 18613577. The reversal of 18613564 is 46531681.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18613561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047 + ... + 6190.

Almost surely, 2^18613564 is an apocalyptic number.

It is an amenable number.

18613564 is a deficient number, since it is larger than the sum of its proper divisors (14015340).

18613564 is a wasteful number, since it uses less digits than its factorization.

18613564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884 (or 7882 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 18613564 is about 4314.3439825772. The cubic root of 18613564 is about 265.0186957262.

The spelling of 18613564 in words is "eighteen million, six hundred thirteen thousand, five hundred sixty-four".