18366912164 has 24 divisors (see below), whose sum is σ = 32856321120. Its totient is φ = 8981005824.

The previous prime is 18366912143. The next prime is 18366912169. The reversal of 18366912164 is 46121966381.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18366912169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156074 + ... + 247169.

It is an arithmetic number, because the mean of its divisors is an integer number (1369013380).

Almost surely, 2^18366912164 is an apocalyptic number.

It is an amenable number.

18366912164 is a deficient number, since it is larger than the sum of its proper divisors (14489408956).

18366912164 is a wasteful number, since it uses less digits than its factorization.

18366912164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403499 (or 403497 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The spelling of 18366912164 in words is "eighteen billion, three hundred sixty-six million, nine hundred twelve thousand, one hundred sixty-four".