18004725 has 18 divisors (see below), whose sum is σ = 32248866. Its totient is φ = 9602400.

The previous prime is 18004703. The next prime is 18004733. The reversal of 18004725 is 52740081.

It can be written as a sum of positive squares in 3 ways, for example, as 86436 + 17918289 = 294^2 + 4233^2 .

It is not a de Polignac number, because 18004725 - 2⁶ = 18004661 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39786 + ... + 40235.

Almost surely, 2^18004725 is an apocalyptic number.

18004725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18004725 is a deficient number, since it is larger than the sum of its proper divisors (14244141).

18004725 is a wasteful number, since it uses less digits than its factorization.

18004725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80037 (or 80029 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18004725 is about 4243.1974971712. The cubic root of 18004725 is about 262.0970689019.

The spelling of 18004725 in words is "eighteen million, four thousand, seven hundred twenty-five".