18751437136512 has 48 divisors (see below), whose sum is σ = 53959213638330. Its totient is φ = 6250479045120.

The previous prime is 18751437136511. The next prime is 18751437136639. The reversal of 18751437136512 is 21563173415781.

18751437136512 is a `hidden beast` number, since 1 + 8 + 7 + 51 + 4 + 3 + 71 + 3 + 6 + 512 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9913278943296 + 8838158193216 = 3148536^2 + 2972904^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18751437136512² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18751437136511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8138643439 + ... + 8138645742.

Almost surely, 2^{18751437136512} is an apocalyptic number.

18751437136512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18751437136512 is an abundant number, since it is smaller than the sum of its proper divisors (35207776501818).

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

18751437136512 is a wasteful number, since it uses less digits than its factorization.

18751437136512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16277289201 (or 16277289186 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 18751437136512 in words is "eighteen trillion, seven hundred fifty-one billion, four hundred thirty-seven million, one hundred thirty-six thousand, five hundred twelve".