18022117 has 8 divisors (see below), whose sum is σ = 18618336. Its totient is φ = 17434032.

The previous prime is 18022111. The next prime is 18022141. The reversal of 18022117 is 71122081.

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 18022117 - 2¹⁹ = 17497829 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 (18022111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2643 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (2327292).

Almost surely, 2^18022117 is an apocalyptic number.

It is an amenable number.

18022117 is a deficient number, since it is larger than the sum of its proper divisors (596219).

18022117 is a wasteful number, since it uses less digits than its factorization.

18022117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 18022117 is about 4245.2464003871. The cubic root of 18022117 is about 262.1814342607.

Adding to 18022117 its reverse (71122081), we get a palindrome (89144198).

The spelling of 18022117 in words is "eighteen million, twenty-two thousand, one hundred seventeen".