18974831312 has 20 divisors (see below), whose sum is σ = 38031451620. Its totient is φ = 9160263168.

The previous prime is 18974831297. The next prime is 18974831329. The reversal of 18974831312 is 21313847981.

It can be written as a sum of positive squares in 2 ways, for example, as 3767995456 + 15206835856 = 61384^2 + 123316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20446553 + ... + 20447480.

It is an arithmetic number, because the mean of its divisors is an integer number (1901572581).

Almost surely, 2^18974831312 is an apocalyptic number.

It is an amenable number.

18974831312 is an abundant number, since it is smaller than the sum of its proper divisors (19056620308).

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

18974831312 is a wasteful number, since it uses less digits than its factorization.

18974831312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40894070 (or 40894064 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The spelling of 18974831312 in words is "eighteen billion, nine hundred seventy-four million, eight hundred thirty-one thousand, three hundred twelve".