18368518685 has 8 divisors (see below), whose sum is σ = 24046060896. Its totient is φ = 13358922640.

The previous prime is 18368518643. The next prime is 18368518711. The reversal of 18368518685 is 58681586381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-18368518685 is a prime.

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, 166986479 + ... + 166986588.

It is an arithmetic number, because the mean of its divisors is an integer number (3005757612).

Almost surely, 2^18368518685 is an apocalyptic number.

It is an amenable number.

18368518685 is a deficient number, since it is larger than the sum of its proper divisors (5677542211).

18368518685 is a wasteful number, since it uses less digits than its factorization.

18368518685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333973083.

The product of its digits is 11059200, while the sum is 59.

The spelling of 18368518685 in words is "eighteen billion, three hundred sixty-eight million, five hundred eighteen thousand, six hundred eighty-five".