18531688297864 has 64 divisors (see below), whose sum is σ = 41438744202240. Its totient is φ = 7596579228480.

The previous prime is 18531688297853. The next prime is 18531688297909. The reversal of 18531688297864 is 46879288613581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39606547 + ... + 40071709.

It is an arithmetic number, because the mean of its divisors is an integer number (647480378160).

Almost surely, 2^{18531688297864} is an apocalyptic number.

18531688297864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18531688297864 is an abundant number, since it is smaller than the sum of its proper divisors (22907055904376).

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

18531688297864 is a wasteful number, since it uses less digits than its factorization.

18531688297864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496130 (or 496126 counting only the distinct ones).

The product of its digits is 1114767360, while the sum is 76.

The spelling of 18531688297864 in words is "eighteen trillion, five hundred thirty-one billion, six hundred eighty-eight million, two hundred ninety-seven thousand, eight hundred sixty-four".