18226317 has 8 divisors (see below), whose sum is σ = 24438240. Its totient is φ = 12082640.

The previous prime is 18226309. The next prime is 18226319. The reversal of 18226317 is 71362281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18226317 - 2³ = 18226309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226319) 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 7 ways as a sum of consecutive naturals, for example, 16434 + ... + 17507.

It is an arithmetic number, because the mean of its divisors is an integer number (3054780).

Almost surely, 2^18226317 is an apocalyptic number.

It is an amenable number.

18226317 is a deficient number, since it is larger than the sum of its proper divisors (6211923).

18226317 is a wasteful number, since it uses less digits than its factorization.

18226317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34123.

The product of its digits is 4032, while the sum is 30.

The square root of 18226317 is about 4269.2290873178. The cubic root of 18226317 is about 263.1679352681.

Adding to 18226317 its reverse (71362281), we get a palindrome (89588598).

The spelling of 18226317 in words is "eighteen million, two hundred twenty-six thousand, three hundred seventeen".