18516018168 has 48 divisors (see below), whose sum is σ = 52786897800. Its totient is φ = 5847163200.

The previous prime is 18516018167. The next prime is 18516018181. The reversal of 18516018168 is 86181061581.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18516018167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6766183 + ... + 6768918.

Almost surely, 2^18516018168 is an apocalyptic number.

18516018168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18516018168 is an abundant number, since it is smaller than the sum of its proper divisors (34270879632).

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

18516018168 is a wasteful number, since it uses less digits than its factorization.

18516018168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13535132 (or 13535125 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

The spelling of 18516018168 in words is "eighteen billion, five hundred sixteen million, eighteen thousand, one hundred sixty-eight".