18316564 has 12 divisors (see below), whose sum is σ = 36633184. Its totient is φ = 7849944.

The previous prime is 18316561. The next prime is 18316601. The reversal of 18316564 is 46561381.

It is a happy number.

18316564 is an admirable 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 (18316561) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 327054 + ... + 327109.

Almost surely, 2^18316564 is an apocalyptic number.

18316564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18316564 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.

18316564 is a wasteful number, since it uses less digits than its factorization.

18316564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654174 (or 654172 counting only the distinct ones).

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

The square root of 18316564 is about 4279.7855086441. The cubic root of 18316564 is about 263.6015760822.

The spelling of 18316564 in words is "eighteen million, three hundred sixteen thousand, five hundred sixty-four".