18792239856 has 40 divisors (see below), whose sum is σ = 52280976720. Its totient is φ = 5782227456.

The previous prime is 18792239849. The next prime is 18792239887. The reversal of 18792239856 is 65893229781.

It is a self number, because there is not a number n which added to its sum of digits gives 18792239856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15057261 + ... + 15058508.

It is an arithmetic number, because the mean of its divisors is an integer number (1307024418).

Almost surely, 2^18792239856 is an apocalyptic number.

18792239856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18792239856 is an abundant number, since it is smaller than the sum of its proper divisors (33488736864).

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

18792239856 is a wasteful number, since it uses less digits than its factorization.

18792239856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30115793 (or 30115787 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The spelling of 18792239856 in words is "eighteen billion, seven hundred ninety-two million, two hundred thirty-nine thousand, eight hundred fifty-six".