18085312887 has 8 divisors (see below), whose sum is σ = 25382895360. Its totient is φ = 11422302840.

The previous prime is 18085312867. The next prime is 18085312933. The reversal of 18085312887 is 78821358081.

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

It is not a de Polignac number, because 18085312887 - 2¹¹ = 18085310839 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085312837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158643039 + ... + 158643152.

It is an arithmetic number, because the mean of its divisors is an integer number (3172861920).

Almost surely, 2^18085312887 is an apocalyptic number.

18085312887 is a deficient number, since it is larger than the sum of its proper divisors (7297582473).

18085312887 is a wasteful number, since it uses less digits than its factorization.

18085312887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317286213.

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 18085312887 in words is "eighteen billion, eighty-five million, three hundred twelve thousand, eight hundred eighty-seven".