18004544 has 14 divisors (see below), whose sum is σ = 35727894. Its totient is φ = 9002240.

The previous prime is 18004541. The next prime is 18004579. The reversal of 18004544 is 44540081.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 3564544 = 3800^2 + 1888^2 .

It is not an unprimeable number, because it can be changed into a prime (18004541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140597 + ... + 140724.

Almost surely, 2^18004544 is an apocalyptic number.

It is an amenable number.

18004544 is a deficient number, since it is larger than the sum of its proper divisors (17723350).

18004544 is an equidigital number, since it uses as much as digits as its factorization.

18004544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281333 (or 281323 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 18004544 is about 4243.1761688622. The cubic root of 18004544 is about 262.0961906189.

The spelling of 18004544 in words is "eighteen million, four thousand, five hundred forty-four".