18365719508 has 24 divisors (see below), whose sum is σ = 32985144192. Its totient is φ = 8942661504.

The previous prime is 18365719439. The next prime is 18365719513. The reversal of 18365719508 is 80591756381.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18365719508.

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, 100460 + ... + 216387.

It is an arithmetic number, because the mean of its divisors is an integer number (1374381008).

Almost surely, 2^18365719508 is an apocalyptic number.

It is an amenable number.

18365719508 is a deficient number, since it is larger than the sum of its proper divisors (14619424684).

18365719508 is a wasteful number, since it uses less digits than its factorization.

18365719508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317231 (or 317229 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 18365719508 in words is "eighteen billion, three hundred sixty-five million, seven hundred nineteen thousand, five hundred eight".