18529225 has 48 divisors (see below), whose sum is σ = 27748224. Its totient is φ = 12096000.

The previous prime is 18529223. The next prime is 18529241. The reversal of 18529225 is 52292581.

It is a happy number.

It is not a de Polignac number, because 18529225 - 2¹ = 18529223 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18529223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253789 + ... + 253861.

It is an arithmetic number, because the mean of its divisors is an integer number (578088).

Almost surely, 2^18529225 is an apocalyptic number.

It is an amenable number.

18529225 is a deficient number, since it is larger than the sum of its proper divisors (9218999).

18529225 is a wasteful number, since it uses less digits than its factorization.

18529225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 173 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 18529225 is about 4304.5586301037. The cubic root of 18529225 is about 264.6178186118.

The spelling of 18529225 in words is "eighteen million, five hundred twenty-nine thousand, two hundred twenty-five".