18189325 has 36 divisors (see below), whose sum is σ = 28366240. Its totient is φ = 11325600.

The previous prime is 18189323. The next prime is 18189331. The reversal of 18189325 is 52398181.

It is not a de Polignac number, because 18189325 - 2¹ = 18189323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18189323) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20746 + ... + 21604.

Almost surely, 2^18189325 is an apocalyptic number.

It is an amenable number.

18189325 is a deficient number, since it is larger than the sum of its proper divisors (10176915).

18189325 is a wasteful number, since it uses less digits than its factorization.

18189325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 882 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 18189325 is about 4264.8944887301. The cubic root of 18189325 is about 262.9897734413.

Subtracting 18189325 from its reverse (52398181), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 18189325 in words is "eighteen million, one hundred eighty-nine thousand, three hundred twenty-five".