18494425 has 6 divisors (see below), whose sum is σ = 22933118. Its totient is φ = 14795520.

The previous prime is 18494401. The next prime is 18494501. The reversal of 18494425 is 52449481.

It can be written as a sum of positive squares in 3 ways, for example, as 38809 + 18455616 = 197^2 + 4296^2 .

It is not a de Polignac number, because 18494425 - 2¹⁷ = 18363353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 369864 + ... + 369913.

Almost surely, 2^18494425 is an apocalyptic number.

It is an amenable number.

18494425 is a deficient number, since it is larger than the sum of its proper divisors (4438693).

18494425 is an equidigital number, since it uses as much as digits as its factorization.

18494425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739787 (or 739782 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 18494425 is about 4300.5145041030. The cubic root of 18494425 is about 264.4520539687.

The spelling of 18494425 in words is "eighteen million, four hundred ninety-four thousand, four hundred twenty-five".