18024489 has 12 divisors (see below), whose sum is σ = 29754816. Its totient is φ = 10299672.

The previous prime is 18024469. The next prime is 18024493. The reversal of 18024489 is 98442081.

It is not a de Polignac number, because 18024489 - 2²⁰ = 16975913 is a prime.

It is a super-2 number, since 2×18024489² = 649764407422242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18024449) 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, 142989 + ... + 143114.

It is an arithmetic number, because the mean of its divisors is an integer number (2479568).

Almost surely, 2^18024489 is an apocalyptic number.

It is an amenable number.

18024489 is a deficient number, since it is larger than the sum of its proper divisors (11730327).

18024489 is a wasteful number, since it uses less digits than its factorization.

18024489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286116 (or 286113 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18024489 is about 4245.5257624940. The cubic root of 18024489 is about 262.1929361851.

The spelling of 18024489 in words is "eighteen million, twenty-four thousand, four hundred eighty-nine".