18089424 has 30 divisors (see below), whose sum is σ = 50625666. Its totient is φ = 6029760.

The previous prime is 18089413. The next prime is 18089429. The reversal of 18089424 is 42498081.

It can be written as a sum of positive squares in only one way, i.e., 13927824 + 4161600 = 3732^2 + 2040^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18089429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62667 + ... + 62954.

Almost surely, 2^18089424 is an apocalyptic number.

It is an amenable number.

18089424 is an abundant number, since it is smaller than the sum of its proper divisors (32536242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18089424 is a wasteful number, since it uses less digits than its factorization.

18089424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125635 (or 125626 counting only the distinct ones).

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

The square root of 18089424 is about 4253.1663499092. The cubic root of 18089424 is about 262.5074174775.

The spelling of 18089424 in words is "eighteen million, eighty-nine thousand, four hundred twenty-four".