18875425 has 12 divisors (see below), whose sum is σ = 23459436. Its totient is φ = 15065600.

The previous prime is 18875419. The next prime is 18875443. The reversal of 18875425 is 52457881.

It can be written as a sum of positive squares in 6 ways, for example, as 74529 + 18800896 = 273^2 + 4336^2 .

It is not a de Polignac number, because 18875425 - 2⁵ = 18875393 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 (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20985 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (1954953).

Almost surely, 2^18875425 is an apocalyptic number.

It is an amenable number.

18875425 is a deficient number, since it is larger than the sum of its proper divisors (4584011).

18875425 is an equidigital number, since it uses as much as digits as its factorization.

18875425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 1743 counting only the distinct ones).

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

The square root of 18875425 is about 4344.5857109741. The cubic root of 18875425 is about 266.2556994379.

The spelling of 18875425 in words is "eighteen million, eight hundred seventy-five thousand, four hundred twenty-five".