18040835512 has 32 divisors (see below), whose sum is σ = 39124713600. Its totient is φ = 7638630624.

The previous prime is 18040835453. The next prime is 18040835543. The reversal of 18040835512 is 21553804081.

It is a congruent number.

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, 1936062 + ... + 1945357.

It is an arithmetic number, because the mean of its divisors is an integer number (1222647300).

Almost surely, 2^18040835512 is an apocalyptic number.

It is an amenable number.

18040835512 is an abundant number, since it is smaller than the sum of its proper divisors (21083878088).

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

18040835512 is a wasteful number, since it uses less digits than its factorization.

18040835512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881515 (or 3881511 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 18040835512 in words is "eighteen billion, forty million, eight hundred thirty-five thousand, five hundred twelve".