18046225 has 6 divisors (see below), whose sum is σ = 22377350. Its totient is φ = 14436960.

The previous prime is 18046211. The next prime is 18046229. The reversal of 18046225 is 52264081.

It can be written as a sum of positive squares in 3 ways, for example, as 9216 + 18037009 = 96^2 + 4247^2 .

It is not a de Polignac number, because 18046225 - 2⁷ = 18046097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18046193 and 18046202.

It is not an unprimeable number, because it can be changed into a prime (18046229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360900 + ... + 360949.

Almost surely, 2^18046225 is an apocalyptic number.

It is an amenable number.

18046225 is a deficient number, since it is larger than the sum of its proper divisors (4331125).

18046225 is an equidigital number, since it uses as much as digits as its factorization.

18046225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721859 (or 721854 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 18046225 is about 4248.0848626175. The cubic root of 18046225 is about 262.2982879715.

The spelling of 18046225 in words is "eighteen million, forty-six thousand, two hundred twenty-five".