18396564 has 24 divisors (see below), whose sum is σ = 43091328. Its totient is φ = 6108480.

The previous prime is 18396559. The next prime is 18396569. The reversal of 18396564 is 46569381.

It is an interprime number because it is at equal distance from previous prime (18396559) and next prime (18396569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424 + ... + 6080.

It is an arithmetic number, because the mean of its divisors is an integer number (1795472).

Almost surely, 2^18396564 is an apocalyptic number.

It is an amenable number.

18396564 is an abundant number, since it is smaller than the sum of its proper divisors (24694764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18396564 is a wasteful number, since it uses less digits than its factorization.

18396564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935 (or 5933 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 18396564 is about 4289.1215883908. The cubic root of 18396564 is about 263.9847902165.

The spelling of 18396564 in words is "eighteen million, three hundred ninety-six thousand, five hundred sixty-four".