18558864944 has 60 divisors (see below), whose sum is σ = 36823416960. Its totient is φ = 9060508800.

The previous prime is 18558864941. The next prime is 18558864983. The reversal of 18558864944 is 44946885581.

It is not an unprimeable number, because it can be changed into a prime (18558864941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8790449 + ... + 8792559.

It is an arithmetic number, because the mean of its divisors is an integer number (613723616).

Almost surely, 2^18558864944 is an apocalyptic number.

It is an amenable number.

18558864944 is a deficient number, since it is larger than the sum of its proper divisors (18264552016).

18558864944 is a wasteful number, since it uses less digits than its factorization.

18558864944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370 (or 2293 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 62.

The spelling of 18558864944 in words is "eighteen billion, five hundred fifty-eight million, eight hundred sixty-four thousand, nine hundred forty-four".