20670035189 has 2 divisors, whose sum is σ = 20670035190. Its totient is φ = 20670035188.

The previous prime is 20670035173. The next prime is 20670035213. The reversal of 20670035189 is 98153007602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20104404100 + 565631089 = 141790^2 + 23783^2 .

It is a cyclic number.

It is not a de Polignac number, because 20670035189 - 2⁴ = 20670035173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20670065189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335017594 + 10335017595.

It is an arithmetic number, because the mean of its divisors is an integer number (10335017595).

Almost surely, 2^20670035189 is an apocalyptic number.

It is an amenable number.

20670035189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670035189 is an equidigital number, since it uses as much as digits as its factorization.

20670035189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 20670035189 in words is "twenty billion, six hundred seventy million, thirty-five thousand, one hundred eighty-nine".