18522417 has 4 divisors (see below), whose sum is σ = 24696560. Its totient is φ = 12348276.

The previous prime is 18522377. The next prime is 18522421. The reversal of 18522417 is 71422581.

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 not a de Polignac number, because 18522417 - 2⁶ = 18522353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18522437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087067 + ... + 3087072.

It is an arithmetic number, because the mean of its divisors is an integer number (6174140).

Almost surely, 2^18522417 is an apocalyptic number.

It is an amenable number.

18522417 is a deficient number, since it is larger than the sum of its proper divisors (6174143).

18522417 is an equidigital number, since it uses as much as digits as its factorization.

18522417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174142.

The product of its digits is 4480, while the sum is 30.

The square root of 18522417 is about 4303.7677678983. The cubic root of 18522417 is about 264.5854060529.

Adding to 18522417 its reverse (71422581), we get a palindrome (89944998).

The spelling of 18522417 in words is "eighteen million, five hundred twenty-two thousand, four hundred seventeen".