18669125 has 16 divisors (see below), whose sum is σ = 23435568. Its totient is φ = 14848000.

The previous prime is 18669121. The next prime is 18669137. The reversal of 18669125 is 52196681.

It can be written as a sum of positive squares in 8 ways, for example, as 4778596 + 13890529 = 2186^2 + 3727^2 .

It is not a de Polignac number, because 18669125 - 2² = 18669121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18669121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28805 + ... + 29445.

It is an arithmetic number, because the mean of its divisors is an integer number (1464723).

Almost surely, 2^18669125 is an apocalyptic number.

It is an amenable number.

18669125 is a deficient number, since it is larger than the sum of its proper divisors (4766443).

18669125 is an equidigital number, since it uses as much as digits as its factorization.

18669125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 879 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 18669125 is about 4320.7782863739. The cubic root of 18669125 is about 265.2821250736.

The spelling of 18669125 in words is "eighteen million, six hundred sixty-nine thousand, one hundred twenty-five".