20200565717 has 2 divisors, whose sum is σ = 20200565718. Its totient is φ = 20200565716.

The previous prime is 20200565587. The next prime is 20200565747. The reversal of 20200565717 is 71756500202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20114614276 + 85951441 = 141826^2 + 9271^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200565717 - 2¹² = 20200561621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200565747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100282858 + 10100282859.

It is an arithmetic number, because the mean of its divisors is an integer number (10100282859).

Almost surely, 2^20200565717 is an apocalyptic number.

It is an amenable number.

20200565717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200565717 is an equidigital number, since it uses as much as digits as its factorization.

20200565717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 20200565717 in words is "twenty billion, two hundred million, five hundred sixty-five thousand, seven hundred seventeen".