18098225 has 12 divisors (see below), whose sum is σ = 22511580. Its totient is φ = 14433600.

The previous prime is 18098221. The next prime is 18098237. The reversal of 18098225 is 52289081.

It can be written as a sum of positive squares in 6 ways, for example, as 6754801 + 11343424 = 2599^2 + 3368^2 .

It is not a de Polignac number, because 18098225 - 2² = 18098221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18098221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8795 + ... + 10655.

It is an arithmetic number, because the mean of its divisors is an integer number (1875965).

Almost surely, 2^18098225 is an apocalyptic number.

It is an amenable number.

18098225 is a deficient number, since it is larger than the sum of its proper divisors (4413355).

18098225 is a wasteful number, since it uses less digits than its factorization.

18098225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260 (or 2255 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18098225 is about 4254.2008650274. The cubic root of 18098225 is about 262.5499829235.

The spelling of 18098225 in words is "eighteen million, ninety-eight thousand, two hundred twenty-five".