18872661164518 has 16 divisors (see below), whose sum is σ = 32354181430560. Its totient is φ = 8088021354816.

The previous prime is 18872661164503. The next prime is 18872661164527. The reversal of 18872661164518 is 81546116627881.

It is a self number, because there is not a number n which added to its sum of digits gives 18872661164518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21385503 + ... + 22250506.

It is an arithmetic number, because the mean of its divisors is an integer number (2022136339410).

Almost surely, 2^{18872661164518} is an apocalyptic number.

18872661164518 is a deficient number, since it is larger than the sum of its proper divisors (13481520266042).

18872661164518 is a wasteful number, since it uses less digits than its factorization.

18872661164518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43666911.

The product of its digits is 30965760, while the sum is 64.

The spelling of 18872661164518 in words is "eighteen trillion, eight hundred seventy-two billion, six hundred sixty-one million, one hundred sixty-four thousand, five hundred eighteen".