18113317 has 2 divisors, whose sum is σ = 18113318. Its totient is φ = 18113316.

The previous prime is 18113299. The next prime is 18113323. The reversal of 18113317 is 71331181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12609601 + 5503716 = 3551^2 + 2346^2 .

It is a cyclic number.

It is not a de Polignac number, because 18113317 - 2¹⁹ = 17589029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18113291 and 18113300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18119317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056658 + 9056659.

It is an arithmetic number, because the mean of its divisors is an integer number (9056659).

Almost surely, 2^18113317 is an apocalyptic number.

It is an amenable number.

18113317 is a deficient number, since it is larger than the sum of its proper divisors (1).

18113317 is an equidigital number, since it uses as much as digits as its factorization.

18113317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 18113317 is about 4255.9742715388. The cubic root of 18113317 is about 262.6229422597.

Adding to 18113317 its reverse (71331181), we get a palindrome (89444498).

The spelling of 18113317 in words is "eighteen million, one hundred thirteen thousand, three hundred seventeen".