18659941686 has 24 divisors (see below), whose sum is σ = 42557762520. Its totient is φ = 5892613056.

The previous prime is 18659941679. The next prime is 18659941721. The reversal of 18659941686 is 68614995681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27280275 + ... + 27280958.

It is an arithmetic number, because the mean of its divisors is an integer number (1773240105).

Almost surely, 2^18659941686 is an apocalyptic number.

18659941686 is an abundant number, since it is smaller than the sum of its proper divisors (23897820834).

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

18659941686 is a wasteful number, since it uses less digits than its factorization.

18659941686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54561260 (or 54561257 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 18659941686 in words is "eighteen billion, six hundred fifty-nine million, nine hundred forty-one thousand, six hundred eighty-six".