19975183164 has 36 divisors (see below), whose sum is σ = 50630440224. Its totient is φ = 6640247232.

The previous prime is 19975183147. The next prime is 19975183169. The reversal of 19975183164 is 46138157991.

19975183164 is a `hidden beast` number, since 1 + 9 + 97 + 518 + 31 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19975183164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19975183169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742737 + ... + 769160.

Almost surely, 2^19975183164 is an apocalyptic number.

It is an amenable number.

19975183164 is an abundant number, since it is smaller than the sum of its proper divisors (30655257060).

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

19975183164 is a wasteful number, since it uses less digits than its factorization.

19975183164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512274 (or 1512269 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The spelling of 19975183164 in words is "nineteen billion, nine hundred seventy-five million, one hundred eighty-three thousand, one hundred sixty-four".