18547225 has 12 divisors (see below), whose sum is σ = 23292160. Its totient is φ = 14648400.

The previous prime is 18547219. The next prime is 18547237. The reversal of 18547225 is 52274581.

It is a happy number.

It is not a de Polignac number, because 18547225 - 2⁹ = 18546713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2721 + ... + 6670.

Almost surely, 2^18547225 is an apocalyptic number.

It is an amenable number.

18547225 is a deficient number, since it is larger than the sum of its proper divisors (4744935).

18547225 is an equidigital number, since it uses as much as digits as its factorization.

18547225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9480 (or 9475 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 18547225 is about 4306.6489292720. The cubic root of 18547225 is about 264.7034775139.

The spelling of 18547225 in words is "eighteen million, five hundred forty-seven thousand, two hundred twenty-five".