18323564 has 12 divisors (see below), whose sum is σ = 36647184. Its totient is φ = 7852944.

The previous prime is 18323549. The next prime is 18323567. The reversal of 18323564 is 46532381.

18323564 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18323564.

It is not an unprimeable number, because it can be changed into a prime (18323567) 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, 327179 + ... + 327234.

It is an arithmetic number, because the mean of its divisors is an integer number (3053932).

Almost surely, 2^18323564 is an apocalyptic number.

18323564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18323564 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.

18323564 is a wasteful number, since it uses less digits than its factorization.

18323564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654424 (or 654422 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 18323564 is about 4280.6032285181. The cubic root of 18323564 is about 263.6351518123.

The spelling of 18323564 in words is "eighteen million, three hundred twenty-three thousand, five hundred sixty-four".