18108317 has 2 divisors, whose sum is σ = 18108318. Its totient is φ = 18108316.

The previous prime is 18108287. The next prime is 18108323. The reversal of 18108317 is 71380181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10329796 + 7778521 = 3214^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 18108317 - 2⁶ = 18108253 is a prime.

It is a super-2 number, since 2×18108317² = 655822289144978, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18108317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18108367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9054158 + 9054159.

It is an arithmetic number, because the mean of its divisors is an integer number (9054159).

Almost surely, 2^18108317 is an apocalyptic number.

It is an amenable number.

18108317 is a deficient number, since it is larger than the sum of its proper divisors (1).

18108317 is an equidigital number, since it uses as much as digits as its factorization.

18108317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 18108317 is about 4255.3868214300. The cubic root of 18108317 is about 262.5987752236.

Adding to 18108317 its reverse (71380181), we get a palindrome (89488498).

The spelling of 18108317 in words is "eighteen million, one hundred eight thousand, three hundred seventeen".