18706025 has 12 divisors (see below), whose sum is σ = 24980172. Its totient is φ = 13813440.

The previous prime is 18706007. The next prime is 18706027. The reversal of 18706025 is 52060781.

It can be written as a sum of positive squares in 6 ways, for example, as 4897369 + 13808656 = 2213^2 + 3716^2 .

It is not a de Polignac number, because 18706025 - 2⁸ = 18705769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18706027) 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, 28454 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (2081681).

Almost surely, 2^18706025 is an apocalyptic number.

It is an amenable number.

18706025 is a deficient number, since it is larger than the sum of its proper divisors (6274147).

18706025 is a wasteful number, since it uses less digits than its factorization.

18706025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57580 (or 57575 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18706025 is about 4325.0462425274. The cubic root of 18706025 is about 265.4567890021.

The spelling of 18706025 in words is "eighteen million, seven hundred six thousand, twenty-five".