18474425 has 6 divisors (see below), whose sum is σ = 22908318. Its totient is φ = 14779520.

The previous prime is 18474377. The next prime is 18474439. The reversal of 18474425 is 52447481.

It can be written as a sum of positive squares in 3 ways, for example, as 5071504 + 13402921 = 2252^2 + 3661^2 .

It is not a de Polignac number, because 18474425 - 2¹⁰ = 18473401 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, 369464 + ... + 369513.

It is an arithmetic number, because the mean of its divisors is an integer number (3818053).

Almost surely, 2^18474425 is an apocalyptic number.

It is an amenable number.

18474425 is a deficient number, since it is larger than the sum of its proper divisors (4433893).

18474425 is an equidigital number, since it uses as much as digits as its factorization.

18474425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738987 (or 738982 counting only the distinct ones).

The product of its digits is 35840, while the sum is 35.

The square root of 18474425 is about 4298.1885719452. The cubic root of 18474425 is about 264.3566928214.

The spelling of 18474425 in words is "eighteen million, four hundred seventy-four thousand, four hundred twenty-five".