18681874886 has 4 divisors (see below), whose sum is σ = 28022812332. Its totient is φ = 9340937442.

The previous prime is 18681874877. The next prime is 18681874919. The reversal of 18681874886 is 68847818681.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4670468720 + ... + 4670468723.

It is an arithmetic number, because the mean of its divisors is an integer number (7005703083).

Almost surely, 2^18681874886 is an apocalyptic number.

18681874886 is a deficient number, since it is larger than the sum of its proper divisors (9340937446).

18681874886 is an equidigital number, since it uses as much as digits as its factorization.

18681874886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9340937445.

The product of its digits is 33030144, while the sum is 65.

The spelling of 18681874886 in words is "eighteen billion, six hundred eighty-one million, eight hundred seventy-four thousand, eight hundred eighty-six".