18447056432 has 40 divisors (see below), whose sum is σ = 41083206816. Its totient is φ = 7860174336.

The previous prime is 18447056429. The next prime is 18447056477. The reversal of 18447056432 is 23465074481.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456653 + ... + 495404.

Almost surely, 2^18447056432 is an apocalyptic number.

It is an amenable number.

18447056432 is an abundant number, since it is smaller than the sum of its proper divisors (22636150384).

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

18447056432 is a wasteful number, since it uses less digits than its factorization.

18447056432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952245 (or 952239 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 18447056432 in words is "eighteen billion, four hundred forty-seven million, fifty-six thousand, four hundred thirty-two".