18874225 has 6 divisors (see below), whose sum is σ = 23404070. Its totient is φ = 15099360.

The previous prime is 18874217. The next prime is 18874231. The reversal of 18874225 is 52247881.

It can be written as a sum of positive squares in 3 ways, for example, as 418609 + 18455616 = 647^2 + 4296^2 .

It is not a de Polignac number, because 18874225 - 2³ = 18874217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 377460 + ... + 377509.

Almost surely, 2^18874225 is an apocalyptic number.

It is an amenable number.

18874225 is a deficient number, since it is larger than the sum of its proper divisors (4529845).

18874225 is an equidigital number, since it uses as much as digits as its factorization.

18874225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754979 (or 754974 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 18874225 is about 4344.4476058528. The cubic root of 18874225 is about 266.2500569405.

The spelling of 18874225 in words is "eighteen million, eight hundred seventy-four thousand, two hundred twenty-five".