18024640 has 112 divisors (see below), whose sum is σ = 46817280. Its totient is φ = 6589440.

The previous prime is 18024623. The next prime is 18024653. The reversal of 18024640 is 4642081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228121 + ... + 228199.

Almost surely, 2^18024640 is an apocalyptic number.

18024640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18024640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23408640).

18024640 is an abundant number, since it is smaller than the sum of its proper divisors (28792640).

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

18024640 is a wasteful number, since it uses less digits than its factorization.

18024640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 18024640 is about 4245.5435458843. The cubic root of 18024640 is about 262.1936683560.

The spelling of 18024640 in words is "eighteen million, twenty-four thousand, six hundred forty".