18618558857824 has 24 divisors (see below), whose sum is σ = 36655811242848. Its totient is φ = 9309146478720.

The previous prime is 18618558857803. The next prime is 18618558857831. The reversal of 18618558857824 is 42875885581681.

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, 1859512 + ... + 6379255.

It is an arithmetic number, because the mean of its divisors is an integer number (1527325468452).

Almost surely, 2^{18618558857824} is an apocalyptic number.

It is an amenable number.

18618558857824 is a deficient number, since it is larger than the sum of its proper divisors (18037252385024).

18618558857824 is an equidigital number, since it uses as much as digits as its factorization.

18618558857824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8309398 (or 8309390 counting only the distinct ones).

The product of its digits is 1376256000, while the sum is 76.

The spelling of 18618558857824 in words is "eighteen trillion, six hundred eighteen billion, five hundred fifty-eight million, eight hundred fifty-seven thousand, eight hundred twenty-four".