18657699839 has 8 divisors (see below), whose sum is σ = 19105775040. Its totient is φ = 18211754016.

The previous prime is 18657699833. The next prime is 18657699899. The reversal of 18657699839 is 93899675681.

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-18657699839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18657699833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514604 + ... + 549665.

It is an arithmetic number, because the mean of its divisors is an integer number (2388221880).

Almost surely, 2^18657699839 is an apocalyptic number.

18657699839 is a deficient number, since it is larger than the sum of its proper divisors (448075201).

18657699839 is a wasteful number, since it uses less digits than its factorization.

18657699839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064689.

The product of its digits is 176359680, while the sum is 71.

The spelling of 18657699839 in words is "eighteen billion, six hundred fifty-seven million, six hundred ninety-nine thousand, eight hundred thirty-nine".