18999940374688 has 96 divisors (see below), whose sum is σ = 46168739721216. Its totient is φ = 7495166435328.

The previous prime is 18999940374647. The next prime is 18999940374731. The reversal of 18999940374688 is 88647304999981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8213856 + ... + 10269727.

It is an arithmetic number, because the mean of its divisors is an integer number (480924372096).

Almost surely, 2^{18999940374688} is an apocalyptic number.

It is an amenable number.

18999940374688 is an abundant number, since it is smaller than the sum of its proper divisors (27168799346528).

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

18999940374688 is a wasteful number, since it uses less digits than its factorization.

18999940374688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18483966 (or 18483958 counting only the distinct ones).

The product of its (nonzero) digits is 6772211712, while the sum is 85.

The spelling of 18999940374688 in words is "eighteen trillion, nine hundred ninety-nine billion, nine hundred forty million, three hundred seventy-four thousand, six hundred eighty-eight".