18004025 has 24 divisors (see below), whose sum is σ = 24831744. Its totient is φ = 12859200.

The previous prime is 18004013. The next prime is 18004033. The reversal of 18004025 is 52040081.

It is not a de Polignac number, because 18004025 - 2¹⁰ = 18003001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18003988 and 18004006.

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 23 ways as a sum of consecutive naturals, for example, 9182 + ... + 10968.

It is an arithmetic number, because the mean of its divisors is an integer number (1034656).

Almost surely, 2^18004025 is an apocalyptic number.

It is an amenable number.

18004025 is a deficient number, since it is larger than the sum of its proper divisors (6827719).

18004025 is a wasteful number, since it uses less digits than its factorization.

18004025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 18004025 is about 4243.1150114038. The cubic root of 18004025 is about 262.0936721949.

The spelling of 18004025 in words is "eighteen million, four thousand, twenty-five".