18942646164 has 48 divisors (see below), whose sum is σ = 48090224448. Its totient is φ = 5768414208.

The previous prime is 18942646109. The next prime is 18942646183. The reversal of 18942646164 is 46164624981.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610782 + ... + 641045.

It is an arithmetic number, because the mean of its divisors is an integer number (1001879676).

Almost surely, 2^18942646164 is an apocalyptic number.

It is an amenable number.

18942646164 is an abundant number, since it is smaller than the sum of its proper divisors (29147578284).

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

18942646164 is a wasteful number, since it uses less digits than its factorization.

18942646164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251944 (or 1251942 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The spelling of 18942646164 in words is "eighteen billion, nine hundred forty-two million, six hundred forty-six thousand, one hundred sixty-four".