18108025 has 12 divisors (see below), whose sum is σ = 24181612. Its totient is φ = 13371840.

The previous prime is 18108001. The next prime is 18108037. The reversal of 18108025 is 52080181.

It can be written as a sum of positive squares in 6 ways, for example, as 104976 + 18003049 = 324^2 + 4243^2 .

It is not a de Polignac number, because 18108025 - 2⁵ = 18107993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 27534 + ... + 28183.

Almost surely, 2^18108025 is an apocalyptic number.

It is an amenable number.

18108025 is a deficient number, since it is larger than the sum of its proper divisors (6073587).

18108025 is a wasteful number, since it uses less digits than its factorization.

18108025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55740 (or 55735 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 18108025 is about 4255.3525118373. The cubic root of 18108025 is about 262.5973637312.

The spelling of 18108025 in words is "eighteen million, one hundred eight thousand, twenty-five".