18317189508 has 48 divisors (see below), whose sum is σ = 42907576320. Its totient is φ = 6081847200.

The previous prime is 18317189491. The next prime is 18317189519. The reversal of 18317189508 is 80598171381.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5042853 + ... + 5046483.

It is an arithmetic number, because the mean of its divisors is an integer number (893907840).

Almost surely, 2^18317189508 is an apocalyptic number.

It is an amenable number.

18317189508 is an abundant number, since it is smaller than the sum of its proper divisors (24590386812).

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

18317189508 is a wasteful number, since it uses less digits than its factorization.

18317189508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168 (or 5166 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 51.

The spelling of 18317189508 in words is "eighteen billion, three hundred seventeen million, one hundred eighty-nine thousand, five hundred eight".