18717203900684 has 12 divisors (see below), whose sum is σ = 32879650960464. Its totient is φ = 9323017911984.

The previous prime is 18717203900663. The next prime is 18717203900701. The reversal of 18717203900684 is 48600930271781.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8896008407 + ... + 8896010510.

It is an arithmetic number, because the mean of its divisors is an integer number (2739970913372).

Almost surely, 2^{18717203900684} is an apocalyptic number.

It is an amenable number.

18717203900684 is a deficient number, since it is larger than the sum of its proper divisors (14162447059780).

18717203900684 is a wasteful number, since it uses less digits than its factorization.

18717203900684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17792019184 (or 17792019182 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 18717203900684 in words is "eighteen trillion, seven hundred seventeen billion, two hundred three million, nine hundred thousand, six hundred eighty-four".