18708425 has 6 divisors (see below), whose sum is σ = 23198478. Its totient is φ = 14966720.

The previous prime is 18708419. The next prime is 18708457. The reversal of 18708425 is 52480781.

It can be written as a sum of positive squares in 3 ways, for example, as 11449 + 18696976 = 107^2 + 4324^2 .

It is not a de Polignac number, because 18708425 - 2⁴ = 18708409 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, 374144 + ... + 374193.

It is an arithmetic number, because the mean of its divisors is an integer number (3866413).

Almost surely, 2^18708425 is an apocalyptic number.

It is an amenable number.

18708425 is a deficient number, since it is larger than the sum of its proper divisors (4490053).

18708425 is an equidigital number, since it uses as much as digits as its factorization.

18708425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748347 (or 748342 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 18708425 is about 4325.3236873094. The cubic root of 18708425 is about 265.4681412990.

The spelling of 18708425 in words is "eighteen million, seven hundred eight thousand, four hundred twenty-five".