18705892086 has 64 divisors (see below), whose sum is σ = 47540160000. Its totient is φ = 5340813408.

The previous prime is 18705892067. The next prime is 18705892123. The reversal of 18705892086 is 68029850781.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550116 + ... + 583128.

It is an arithmetic number, because the mean of its divisors is an integer number (742815000).

Almost surely, 2^18705892086 is an apocalyptic number.

18705892086 is an abundant number, since it is smaller than the sum of its proper divisors (28834267914).

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

18705892086 is a wasteful number, since it uses less digits than its factorization.

18705892086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34530 (or 34524 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 18705892086 in words is "eighteen billion, seven hundred five million, eight hundred ninety-two thousand, eighty-six".