18605668686 has 64 divisors (see below), whose sum is σ = 40830345216. Its totient is φ = 5605376000.

The previous prime is 18605668681. The next prime is 18605668727. The reversal of 18605668686 is 68686650681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18605668681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16164211 + ... + 16165361.

It is an arithmetic number, because the mean of its divisors is an integer number (637974144).

Almost surely, 2^18605668686 is an apocalyptic number.

18605668686 is an abundant number, since it is smaller than the sum of its proper divisors (22224676530).

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

18605668686 is a wasteful number, since it uses less digits than its factorization.

18605668686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377.

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 18605668686 in words is "eighteen billion, six hundred five million, six hundred sixty-eight thousand, six hundred eighty-six".