18005314856 has 32 divisors (see below), whose sum is σ = 36331859880. Its totient is φ = 8334182400.

The previous prime is 18005314843. The next prime is 18005314913. The reversal of 18005314856 is 65841350081.

It can be written as a sum of positive squares in 4 ways, for example, as 12151534756 + 5853780100 = 110234^2 + 76510^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076885 + ... + 1093476.

Almost surely, 2^18005314856 is an apocalyptic number.

It is an amenable number.

18005314856 is an abundant number, since it is smaller than the sum of its proper divisors (18326545024).

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

18005314856 is a wasteful number, since it uses less digits than its factorization.

18005314856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170445 (or 2170441 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 18005314856 in words is "eighteen billion, five million, three hundred fourteen thousand, eight hundred fifty-six".