18422317 has 4 divisors (see below), whose sum is σ = 18442336. Its totient is φ = 18402300.

The previous prime is 18422311. The next prime is 18422321. The reversal of 18422317 is 71322481.

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-18422317 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 (18422311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8559 + ... + 10492.

It is an arithmetic number, because the mean of its divisors is an integer number (4610584).

Almost surely, 2^18422317 is an apocalyptic number.

It is an amenable number.

18422317 is a deficient number, since it is larger than the sum of its proper divisors (20019).

18422317 is an equidigital number, since it uses as much as digits as its factorization.

18422317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20018.

The product of its digits is 2688, while the sum is 28.

The square root of 18422317 is about 4292.1226683309. The cubic root of 18422317 is about 264.1079152096.

Adding to 18422317 its reverse (71322481), we get a palindrome (89744798).

The spelling of 18422317 in words is "eighteen million, four hundred twenty-two thousand, three hundred seventeen".