18530725 has 6 divisors (see below), whose sum is σ = 22978130. Its totient is φ = 14824560.

The previous prime is 18530713. The next prime is 18530741. The reversal of 18530725 is 52703581.

It can be written as a sum of positive squares in 3 ways, for example, as 229441 + 18301284 = 479^2 + 4278^2 .

It is not a de Polignac number, because 18530725 - 2⁵ = 18530693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370590 + ... + 370639.

Almost surely, 2^18530725 is an apocalyptic number.

It is an amenable number.

18530725 is a deficient number, since it is larger than the sum of its proper divisors (4447405).

18530725 is an equidigital number, since it uses as much as digits as its factorization.

18530725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741239 (or 741234 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 18530725 is about 4304.7328604688. The cubic root of 18530725 is about 264.6249589719.

The spelling of 18530725 in words is "eighteen million, five hundred thirty thousand, seven hundred twenty-five".