18402194016564 has 24 divisors (see below), whose sum is σ = 43985732040768. Its totient is φ = 5984453338560.

The previous prime is 18402194016539. The next prime is 18402194016587. The reversal of 18402194016564 is 46561049120481.

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, 18701416192 + ... + 18701417175.

It is an arithmetic number, because the mean of its divisors is an integer number (1832738835032).

Almost surely, 2^{18402194016564} is an apocalyptic number.

It is an amenable number.

18402194016564 is an abundant number, since it is smaller than the sum of its proper divisors (25583538024204).

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

18402194016564 is a wasteful number, since it uses less digits than its factorization.

18402194016564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37402833415 (or 37402833413 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 18402194016564 in words is "eighteen trillion, four hundred two billion, one hundred ninety-four million, sixteen thousand, five hundred sixty-four".