18317878108 has 12 divisors (see below), whose sum is σ = 32339971440. Its totient is φ = 9077886272.

The previous prime is 18317878091. The next prime is 18317878121. The reversal of 18317878108 is 80187871381.

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, 20262688 + ... + 20263591.

It is an arithmetic number, because the mean of its divisors is an integer number (2694997620).

Almost surely, 2^18317878108 is an apocalyptic number.

It is an amenable number.

18317878108 is a deficient number, since it is larger than the sum of its proper divisors (14022093332).

18317878108 is a wasteful number, since it uses less digits than its factorization.

18317878108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40526396 (or 40526394 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 52.

The spelling of 18317878108 in words is "eighteen billion, three hundred seventeen million, eight hundred seventy-eight thousand, one hundred eight".