18999071748 has 48 divisors (see below), whose sum is σ = 49264306560. Its totient is φ = 6332065632.

The previous prime is 18999071737. The next prime is 18999071821. The reversal of 18999071748 is 84717099981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1310065 + ... + 1324487.

It is an arithmetic number, because the mean of its divisors is an integer number (1026339720).

Almost surely, 2^18999071748 is an apocalyptic number.

18999071748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18999071748 is an abundant number, since it is smaller than the sum of its proper divisors (30265234812).

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

18999071748 is a wasteful number, since it uses less digits than its factorization.

18999071748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26633 (or 26625 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 63.

The spelling of 18999071748 in words is "eighteen billion, nine hundred ninety-nine million, seventy-one thousand, seven hundred forty-eight".