18002025 has 36 divisors (see below), whose sum is σ = 33948720. Its totient is φ = 9093600.

The previous prime is 18002009. The next prime is 18002051. The reversal of 18002025 is 52020081.

It is not a de Polignac number, because 18002025 - 2⁴ = 18002009 is a prime.

18002025 is a modest number, since divided by 2025 gives 1800 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 18001989 and 18002007.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2170 + ... + 6380.

It is an arithmetic number, because the mean of its divisors is an integer number (943020).

Almost surely, 2^18002025 is an apocalyptic number.

18002025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18002025 is a deficient number, since it is larger than the sum of its proper divisors (15946695).

18002025 is a wasteful number, since it uses less digits than its factorization.

18002025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246 (or 4238 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 18002025 is about 4242.8793289463. The cubic root of 18002025 is about 262.0839668326.

The spelling of 18002025 in words is "eighteen million, two thousand, twenty-five".