18659844672 has 112 divisors (see below), whose sum is σ = 59393571840. Its totient is φ = 5050778112.

The previous prime is 18659844659. The next prime is 18659844733. The reversal of 18659844672 is 27644895681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339828 + ... + 390899.

Almost surely, 2^18659844672 is an apocalyptic number.

18659844672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18659844672 is an abundant number, since it is smaller than the sum of its proper divisors (40733727168).

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

18659844672 is a wasteful number, since it uses less digits than its factorization.

18659844672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730768 (or 730758 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The spelling of 18659844672 in words is "eighteen billion, six hundred fifty-nine million, eight hundred forty-four thousand, six hundred seventy-two".