18087179997 has 16 divisors (see below), whose sum is σ = 24468816320. Its totient is φ = 11882132352.

The previous prime is 18087179977. The next prime is 18087180029. The reversal of 18087179997 is 79997178081.

It is not a de Polignac number, because 18087179997 - 2⁶ = 18087179933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087179917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207654 + ... + 281592.

It is an arithmetic number, because the mean of its divisors is an integer number (1529301020).

Almost surely, 2^18087179997 is an apocalyptic number.

It is an amenable number.

18087179997 is a deficient number, since it is larger than the sum of its proper divisors (6381636323).

18087179997 is a wasteful number, since it uses less digits than its factorization.

18087179997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75132.

The product of its (nonzero) digits is 16003008, while the sum is 66.

The spelling of 18087179997 in words is "eighteen billion, eighty-seven million, one hundred seventy-nine thousand, nine hundred ninety-seven".