18025825 has 12 divisors (see below), whose sum is σ = 22637440. Its totient is φ = 14236560.

The previous prime is 18025823. The next prime is 18025841. The reversal of 18025825 is 52852081.

It is not a de Polignac number, because 18025825 - 2¹ = 18025823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18025823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2589 + ... + 6538.

Almost surely, 2^18025825 is an apocalyptic number.

It is an amenable number.

18025825 is a deficient number, since it is larger than the sum of its proper divisors (4611615).

18025825 is an equidigital number, since it uses as much as digits as its factorization.

18025825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216 (or 9211 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 18025825 is about 4245.6831016928. The cubic root of 18025825 is about 262.1994140591.

The spelling of 18025825 in words is "eighteen million, twenty-five thousand, eight hundred twenty-five".