18873745979328 has 112 divisors (see below), whose sum is σ = 56313457461760. Its totient is φ = 6197349388032.

The previous prime is 18873745979299. The next prime is 18873745979329. The reversal of 18873745979328 is 82397954737881.

It is a happy number.

18873745979328 is a `hidden beast` number, since 1 + 8 + 8 + 73 + 7 + 459 + 7 + 93 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873745979329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81393976 + ... + 81625527.

Almost surely, 2^{18873745979328} is an apocalyptic number.

18873745979328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18873745979328 is an abundant number, since it is smaller than the sum of its proper divisors (37439711482432).

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

18873745979328 is a wasteful number, since it uses less digits than its factorization.

18873745979328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163019591 (or 163019575 counting only the distinct ones).

The product of its digits is 5120962560, while the sum is 81.

The spelling of 18873745979328 in words is "eighteen trillion, eight hundred seventy-three billion, seven hundred forty-five million, nine hundred seventy-nine thousand, three hundred twenty-eight".