18044217 has 12 divisors (see below), whose sum is σ = 26128960. Its totient is φ = 11999448.

The previous prime is 18044209. The next prime is 18044233. The reversal of 18044217 is 71244081.

It is not a de Polignac number, because 18044217 - 2³ = 18044209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18044237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1668 + ... + 6234.

Almost surely, 2^18044217 is an apocalyptic number.

It is an amenable number.

18044217 is a deficient number, since it is larger than the sum of its proper divisors (8084743).

18044217 is a wasteful number, since it uses less digits than its factorization.

18044217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012 (or 5009 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18044217 is about 4247.8485142481. The cubic root of 18044217 is about 262.2885589839.

Adding to 18044217 its reverse (71244081), we get a palindrome (89288298).

The spelling of 18044217 in words is "eighteen million, forty-four thousand, two hundred seventeen".