18568943984 has 20 divisors (see below), whose sum is σ = 36251969160. Its totient is φ = 9213597120.

The previous prime is 18568943963. The next prime is 18568943999. The reversal of 18568943984 is 48934986581.

It is a self number, because there is not a number n which added to its sum of digits gives 18568943984.

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, 4427519 + ... + 4431710.

It is an arithmetic number, because the mean of its divisors is an integer number (1812598458).

Almost surely, 2^18568943984 is an apocalyptic number.

It is an amenable number.

18568943984 is a deficient number, since it is larger than the sum of its proper divisors (17683025176).

18568943984 is a wasteful number, since it uses less digits than its factorization.

18568943984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8859368 (or 8859362 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 65.

The spelling of 18568943984 in words is "eighteen billion, five hundred sixty-eight million, nine hundred forty-three thousand, nine hundred eighty-four".