18731974488 has 32 divisors (see below), whose sum is σ = 46866513600. Its totient is φ = 6239114528.

The previous prime is 18731974451. The next prime is 18731974519. The reversal of 18731974488 is 88447913781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273378 + ... + 334961.

It is an arithmetic number, because the mean of its divisors is an integer number (1464578550).

Almost surely, 2^18731974488 is an apocalyptic number.

It is an amenable number.

18731974488 is an abundant number, since it is smaller than the sum of its proper divisors (28134539112).

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

18731974488 is a wasteful number, since it uses less digits than its factorization.

18731974488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609631 (or 609627 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 60.

The spelling of 18731974488 in words is "eighteen billion, seven hundred thirty-one million, nine hundred seventy-four thousand, four hundred eighty-eight".