18080317 has 4 divisors (see below), whose sum is σ = 18131040. Its totient is φ = 18029596.

The previous prime is 18080273. The next prime is 18080327. The reversal of 18080317 is 71308081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18080317 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 (18080327) 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 in 3 ways as a sum of consecutive naturals, for example, 24823 + ... + 25540.

It is an arithmetic number, because the mean of its divisors is an integer number (4532760).

Almost surely, 2^18080317 is an apocalyptic number.

It is an amenable number.

18080317 is a deficient number, since it is larger than the sum of its proper divisors (50723).

18080317 is an equidigital number, since it uses as much as digits as its factorization.

18080317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50722.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18080317 is about 4252.0956009949. The cubic root of 18080317 is about 262.4633575459.

Adding to 18080317 its reverse (71308081), we get a palindrome (89388398).

The spelling of 18080317 in words is "eighteen million, eighty thousand, three hundred seventeen".