18118764 has 36 divisors (see below), whose sum is σ = 45995040. Its totient is φ = 6013920.

The previous prime is 18118721. The next prime is 18118777. The reversal of 18118764 is 46781181.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8749 + ... + 10619.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^18118764 is an apocalyptic number.

It is an amenable number.

18118764 is an abundant number, since it is smaller than the sum of its proper divisors (27876276).

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

18118764 is a wasteful number, since it uses less digits than its factorization.

18118764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2145 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 18118764 is about 4256.6141474181. The cubic root of 18118764 is about 262.6492647677.

The spelling of 18118764 in words is "eighteen million, one hundred eighteen thousand, seven hundred sixty-four".