18316871140 has 12 divisors (see below), whose sum is σ = 38465429436. Its totient is φ = 7326748448.

The previous prime is 18316871099. The next prime is 18316871227. The reversal of 18316871140 is 4117861381.

It can be written as a sum of positive squares in 2 ways, for example, as 10364868864 + 7952002276 = 101808^2 + 89174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18316871093 and 18316871102.

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, 457921759 + ... + 457921798.

It is an arithmetic number, because the mean of its divisors is an integer number (3205452453).

Almost surely, 2^18316871140 is an apocalyptic number.

18316871140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18316871140 is an abundant number, since it is smaller than the sum of its proper divisors (20148558296).

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

18316871140 is a wasteful number, since it uses less digits than its factorization.

18316871140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915843566 (or 915843564 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 18316871140 in words is "eighteen billion, three hundred sixteen million, eight hundred seventy-one thousand, one hundred forty".