18706840928 has 24 divisors (see below), whose sum is σ = 36931703760. Its totient is φ = 9327360640.

The previous prime is 18706840913. The next prime is 18706840961. The reversal of 18706840928 is 82904860781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18706840928.

It is a congruent number.

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, 802703 + ... + 825678.

It is an arithmetic number, because the mean of its divisors is an integer number (1538820990).

Almost surely, 2^18706840928 is an apocalyptic number.

It is an amenable number.

18706840928 is a deficient number, since it is larger than the sum of its proper divisors (18224862832).

18706840928 is a wasteful number, since it uses less digits than its factorization.

18706840928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628750 (or 1628742 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 18706840928 in words is "eighteen billion, seven hundred six million, eight hundred forty thousand, nine hundred twenty-eight".