18841225 has 12 divisors (see below), whose sum is σ = 25160716. Its totient is φ = 13913280.

The previous prime is 18841189. The next prime is 18841241. The reversal of 18841225 is 52214881.

It can be written as a sum of positive squares in 6 ways, for example, as 5143824 + 13697401 = 2268^2 + 3701^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18841225 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28662 + ... + 29311.

Almost surely, 2^18841225 is an apocalyptic number.

It is an amenable number.

18841225 is a deficient number, since it is larger than the sum of its proper divisors (6319491).

18841225 is a wasteful number, since it uses less digits than its factorization.

18841225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57996 (or 57991 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 18841225 is about 4340.6479930996. The cubic root of 18841225 is about 266.0947944501.

The spelling of 18841225 in words is "eighteen million, eight hundred forty-one thousand, two hundred twenty-five".