18317537317 has 8 divisors (see below), whose sum is σ = 18632021760. Its totient is φ = 18003510960.

The previous prime is 18317537311. The next prime is 18317537333. The reversal of 18317537317 is 71373571381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18317537317 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 (18317537311) 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, 33373 + ... + 194290.

It is an arithmetic number, because the mean of its divisors is an integer number (2329002720).

Almost surely, 2^18317537317 is an apocalyptic number.

It is an amenable number.

18317537317 is a deficient number, since it is larger than the sum of its proper divisors (314484443).

18317537317 is a wasteful number, since it uses less digits than its factorization.

18317537317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229043.

The product of its digits is 370440, while the sum is 46.

The spelling of 18317537317 in words is "eighteen billion, three hundred seventeen million, five hundred thirty-seven thousand, three hundred seventeen".