18945025 has 12 divisors (see below), whose sum is σ = 25627824. Its totient is φ = 13778000.

The previous prime is 18945023. The next prime is 18945029. The reversal of 18945025 is 52054981.

It is not a de Polignac number, because 18945025 - 2¹ = 18945023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18945023) 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, 34171 + ... + 34720.

It is an arithmetic number, because the mean of its divisors is an integer number (2135652).

Almost surely, 2^18945025 is an apocalyptic number.

It is an amenable number.

18945025 is a deficient number, since it is larger than the sum of its proper divisors (6682799).

18945025 is a wasteful number, since it uses less digits than its factorization.

18945025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68912 (or 68907 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 18945025 is about 4352.5883104194. The cubic root of 18945025 is about 266.5825559383.

The spelling of 18945025 in words is "eighteen million, nine hundred forty-five thousand, twenty-five".