21874713445018 has 16 divisors (see below), whose sum is σ = 37724056723584. Its totient is φ = 9318740200560.

The previous prime is 21874713444889. The next prime is 21874713445033. The reversal of 21874713445018 is 81054431747812.

It is a self number, because there is not a number n which added to its sum of digits gives 21874713445018.

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, 4678080093 + ... + 4678084768.

It is an arithmetic number, because the mean of its divisors is an integer number (2357753545224).

Almost surely, 2^{21874713445018} is an apocalyptic number.

21874713445018 is a deficient number, since it is larger than the sum of its proper divisors (15849343278566).

21874713445018 is a wasteful number, since it uses less digits than its factorization.

21874713445018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9356165037.

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 21874713445018 in words is "twenty-one trillion, eight hundred seventy-four billion, seven hundred thirteen million, four hundred forty-five thousand, eighteen".