18004325 has 6 divisors (see below), whose sum is σ = 22325394. Its totient is φ = 14403440.

The previous prime is 18004321. The next prime is 18004367. The reversal of 18004325 is 52340081.

It can be written as a sum of positive squares in 3 ways, for example, as 43681 + 17960644 = 209^2 + 4238^2 .

It is not a de Polignac number, because 18004325 - 2² = 18004321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18004325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18004321) 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, 360062 + ... + 360111.

It is an arithmetic number, because the mean of its divisors is an integer number (3720899).

Almost surely, 2^18004325 is an apocalyptic number.

It is an amenable number.

18004325 is a deficient number, since it is larger than the sum of its proper divisors (4321069).

18004325 is an equidigital number, since it uses as much as digits as its factorization.

18004325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720183 (or 720178 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18004325 is about 4243.1503626433. The cubic root of 18004325 is about 262.0951279372.

The spelling of 18004325 in words is "eighteen million, four thousand, three hundred twenty-five".