18885425 has 12 divisors (see below), whose sum is σ = 25219740. Its totient is φ = 13945920.

The previous prime is 18885421. The next prime is 18885457. The reversal of 18885425 is 52458881.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4566769 + 14318656 = 2137^2 + 3784^2 .

It is not a de Polignac number, because 18885425 - 2² = 18885421 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18885421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28730 + ... + 29379.

It is an arithmetic number, because the mean of its divisors is an integer number (2101645).

Almost surely, 2^18885425 is an apocalyptic number.

It is an amenable number.

18885425 is a deficient number, since it is larger than the sum of its proper divisors (6334315).

18885425 is a wasteful number, since it uses less digits than its factorization.

18885425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58132 (or 58127 counting only the distinct ones).

The product of its digits is 102400, while the sum is 41.

The square root of 18885425 is about 4345.7364163051. The cubic root of 18885425 is about 266.3027109522.

The spelling of 18885425 in words is "eighteen million, eight hundred eighty-five thousand, four hundred twenty-five".