18001025 has 24 divisors (see below), whose sum is σ = 26397120. Its totient is φ = 11914560.

The previous prime is 18000989. The next prime is 18001031. The reversal of 18001025 is 52010081.

It is not a de Polignac number, because 18001025 - 2⁸ = 18000769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18000994 and 18001012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3302 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (1099880).

Almost surely, 2^18001025 is an apocalyptic number.

It is an amenable number.

18001025 is a deficient number, since it is larger than the sum of its proper divisors (8396095).

18001025 is a wasteful number, since it uses less digits than its factorization.

18001025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593 (or 3588 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 18001025 is about 4242.7614828081. The cubic root of 18001025 is about 262.0791138819.

The spelling of 18001025 in words is "eighteen million, one thousand, twenty-five".