20185241 has 2 divisors, whose sum is σ = 20185242. Its totient is φ = 20185240.

The previous prime is 20185213. The next prime is 20185259. The reversal of 20185241 is 14258102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19545241 + 640000 = 4421^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 20185241 - 2⁶ = 20185177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20185261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10092620 + 10092621.

It is an arithmetic number, because the mean of its divisors is an integer number (10092621).

Almost surely, 2^20185241 is an apocalyptic number.

It is an amenable number.

20185241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20185241 is an equidigital number, since it uses as much as digits as its factorization.

20185241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 20185241 is about 4492.7987936252. The cubic root of 20185241 is about 272.2772233043.

The spelling of 20185241 in words is "twenty million, one hundred eighty-five thousand, two hundred forty-one".