18701080085 has 4 divisors (see below), whose sum is σ = 22441296108. Its totient is φ = 14960864064.

The previous prime is 18701080033. The next prime is 18701080091. The reversal of 18701080085 is 58008010781.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4820941489 + 13880138596 = 69433^2 + 117814^2 .

It is a cyclic number.

It is not a de Polignac number, because 18701080085 - 2¹⁴ = 18701063701 is a prime.

It is a super-3 number, since 3×18701080085³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

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, 1870108004 + ... + 1870108013.

It is an arithmetic number, because the mean of its divisors is an integer number (5610324027).

Almost surely, 2^18701080085 is an apocalyptic number.

It is an amenable number.

18701080085 is a deficient number, since it is larger than the sum of its proper divisors (3740216023).

18701080085 is an equidigital number, since it uses as much as digits as its factorization.

18701080085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740216022.

The product of its (nonzero) digits is 17920, while the sum is 38.

The spelling of 18701080085 in words is "eighteen billion, seven hundred one million, eighty thousand, eighty-five".