18457825 has 6 divisors (see below), whose sum is σ = 22887734. Its totient is φ = 14766240.

The previous prime is 18457823. The next prime is 18457841. The reversal of 18457825 is 52875481.

It can be written as a sum of positive squares in 3 ways, for example, as 2209 + 18455616 = 47^2 + 4296^2 .

It is not a de Polignac number, because 18457825 - 2¹ = 18457823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18457823) 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, 369132 + ... + 369181.

Almost surely, 2^18457825 is an apocalyptic number.

It is an amenable number.

18457825 is a deficient number, since it is larger than the sum of its proper divisors (4429909).

18457825 is an equidigital number, since it uses as much as digits as its factorization.

18457825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738323 (or 738318 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The square root of 18457825 is about 4296.2570919348. The cubic root of 18457825 is about 264.2774907873.

The spelling of 18457825 in words is "eighteen million, four hundred fifty-seven thousand, eight hundred twenty-five".