18712928944 has 20 divisors (see below), whose sum is σ = 36258547360. Its totient is φ = 9355884480.

The previous prime is 18712928929. The next prime is 18712928951. The reversal of 18712928944 is 44982921781.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363529 + ... + 411799.

It is an arithmetic number, because the mean of its divisors is an integer number (1812927368).

Almost surely, 2^18712928944 is an apocalyptic number.

It is an amenable number.

18712928944 is a deficient number, since it is larger than the sum of its proper divisors (17545618416).

18712928944 is a wasteful number, since it uses less digits than its factorization.

18712928944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72508 (or 72502 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The spelling of 18712928944 in words is "eighteen billion, seven hundred twelve million, nine hundred twenty-eight thousand, nine hundred forty-four".