18690125 has 8 divisors (see below), whose sum is σ = 23325432. Its totient is φ = 14952000.

The previous prime is 18690109. The next prime is 18690127. The reversal of 18690125 is 52109681.

It can be written as a sum of positive squares in 4 ways, for example, as 139876 + 18550249 = 374^2 + 4307^2 .

It is not a de Polignac number, because 18690125 - 2⁴ = 18690109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18690091 and 18690100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18690127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74636 + ... + 74885.

It is an arithmetic number, because the mean of its divisors is an integer number (2915679).

Almost surely, 2^18690125 is an apocalyptic number.

It is an amenable number.

18690125 is a deficient number, since it is larger than the sum of its proper divisors (4635307).

18690125 is an equidigital number, since it uses as much as digits as its factorization.

18690125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149536 (or 149526 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 18690125 is about 4323.2077211256. The cubic root of 18690125 is about 265.3815554987.

The spelling of 18690125 in words is "eighteen million, six hundred ninety thousand, one hundred twenty-five".