18318064856 has 32 divisors (see below), whose sum is σ = 42272459040. Its totient is φ = 7246706688.

The previous prime is 18318064847. The next prime is 18318064871. The reversal of 18318064856 is 65846081381.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12580361 + ... + 12581816.

It is an arithmetic number, because the mean of its divisors is an integer number (1321014345).

Almost surely, 2^18318064856 is an apocalyptic number.

It is an amenable number.

18318064856 is an abundant number, since it is smaller than the sum of its proper divisors (23954394184).

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

18318064856 is a wasteful number, since it uses less digits than its factorization.

18318064856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25162203 (or 25162199 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 18318064856 in words is "eighteen billion, three hundred eighteen million, sixty-four thousand, eight hundred fifty-six".