18228925 has 24 divisors (see below), whose sum is σ = 26560800. Its totient is φ = 12235200.

The previous prime is 18228893. The next prime is 18228937. The reversal of 18228925 is 52982281.

It is not a de Polignac number, because 18228925 - 2⁵ = 18228893 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 1026 + ... + 6124.

It is an arithmetic number, because the mean of its divisors is an integer number (1106700).

Almost surely, 2^18228925 is an apocalyptic number.

It is an amenable number.

18228925 is a deficient number, since it is larger than the sum of its proper divisors (8331875).

18228925 is a wasteful number, since it uses less digits than its factorization.

18228925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133 (or 5128 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 18228925 is about 4269.5345179539. The cubic root of 18228925 is about 263.1804868850.

The spelling of 18228925 in words is "eighteen million, two hundred twenty-eight thousand, nine hundred twenty-five".