18876685616 has 20 divisors (see below), whose sum is σ = 37193471400. Its totient is φ = 9278370432.

The previous prime is 18876685589. The next prime is 18876685621. The reversal of 18876685616 is 61658667881.

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, 9997301 + ... + 9999188.

It is an arithmetic number, because the mean of its divisors is an integer number (1859673570).

Almost surely, 2^18876685616 is an apocalyptic number.

18876685616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18876685616 is a deficient number, since it is larger than the sum of its proper divisors (18316785784).

18876685616 is a wasteful number, since it uses less digits than its factorization.

18876685616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19996556 (or 19996550 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 62.

The spelling of 18876685616 in words is "eighteen billion, eight hundred seventy-six million, six hundred eighty-five thousand, six hundred sixteen".