18858920686 has 8 divisors (see below), whose sum is σ = 28290722040. Its totient is φ = 9428680008.

The previous prime is 18858920677. The next prime is 18858920761. The reversal of 18858920686 is 68602985881.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359476 + ... + 408583.

It is an arithmetic number, because the mean of its divisors is an integer number (3536340255).

Almost surely, 2^18858920686 is an apocalyptic number.

18858920686 is a deficient number, since it is larger than the sum of its proper divisors (9431801354).

18858920686 is a wasteful number, since it uses less digits than its factorization.

18858920686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780338.

The product of its (nonzero) digits is 13271040, while the sum is 61.

The spelling of 18858920686 in words is "eighteen billion, eight hundred fifty-eight million, nine hundred twenty thousand, six hundred eighty-six".