18899425 has 6 divisors (see below), whose sum is σ = 23435318. Its totient is φ = 15119520.

The previous prime is 18899381. The next prime is 18899449. The reversal of 18899425 is 52499881.

It can be written as a sum of positive squares in 3 ways, for example, as 1183744 + 17715681 = 1088^2 + 4209^2 .

It is not a de Polignac number, because 18899425 - 2¹⁵ = 18866657 is a prime.

It is a Duffinian number.

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, 377964 + ... + 378013.

Almost surely, 2^18899425 is an apocalyptic number.

It is an amenable number.

18899425 is a deficient number, since it is larger than the sum of its proper divisors (4535893).

18899425 is an equidigital number, since it uses as much as digits as its factorization.

18899425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755987 (or 755982 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The square root of 18899425 is about 4347.3468920711. The cubic root of 18899425 is about 266.3684992001.

The spelling of 18899425 in words is "eighteen million, eight hundred ninety-nine thousand, four hundred twenty-five".