18081325 has 12 divisors (see below), whose sum is σ = 22473760. Its totient is φ = 14430960.

The previous prime is 18081313. The next prime is 18081337. The reversal of 18081325 is 52318081.

It is an interprime number because it is at equal distance from previous prime (18081313) and next prime (18081337).

It is not a de Polignac number, because 18081325 - 2¹⁵ = 18048557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18081293 and 18081302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19216 + ... + 20134.

Almost surely, 2^18081325 is an apocalyptic number.

It is an amenable number.

18081325 is a deficient number, since it is larger than the sum of its proper divisors (4392435).

18081325 is an equidigital number, since it uses as much as digits as its factorization.

18081325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18081325 is about 4252.2141291332. The cubic root of 18081325 is about 262.4682350074.

The spelling of 18081325 in words is "eighteen million, eighty-one thousand, three hundred twenty-five".