18085394317 has 8 divisors (see below), whose sum is σ = 18575869536. Its totient is φ = 17595007632.

The previous prime is 18085394297. The next prime is 18085394351. The reversal of 18085394317 is 71349358081.

It is a happy number.

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-18085394317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085394387) 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, 787398 + ... + 810040.

It is an arithmetic number, because the mean of its divisors is an integer number (2321983692).

Almost surely, 2^18085394317 is an apocalyptic number.

It is an amenable number.

18085394317 is a deficient number, since it is larger than the sum of its proper divisors (490475219).

18085394317 is a wasteful number, since it uses less digits than its factorization.

18085394317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44267.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 18085394317 in words is "eighteen billion, eighty-five million, three hundred ninety-four thousand, three hundred seventeen".