18687337211172 has 48 divisors (see below), whose sum is σ = 49839182728832. Its totient is φ = 5338565971200.

The previous prime is 18687337211161. The next prime is 18687337211233. The reversal of 18687337211172 is 27111273378681.

It is a super-2 number, since 2×18687337211172² (a number of 27 digits) contains 22 as substring.

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, 13355329 + ... + 14688072.

Almost surely, 2^{18687337211172} is an apocalyptic number.

18687337211172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18687337211172 is an abundant number, since it is smaller than the sum of its proper divisors (31151845517660).

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

18687337211172 is a wasteful number, since it uses less digits than its factorization.

18687337211172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28051348 (or 28051346 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 57.

The spelling of 18687337211172 in words is "eighteen trillion, six hundred eighty-seven billion, three hundred thirty-seven million, two hundred eleven thousand, one hundred seventy-two".