10021993717 has 2 divisors, whose sum is σ = 10021993718. Its totient is φ = 10021993716.

The previous prime is 10021993691. The next prime is 10021993721. The reversal of 10021993717 is 71739912001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7023445636 + 2998548081 = 83806^2 + 54759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021993717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10021993717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021993727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010996858 + 5010996859.

It is an arithmetic number, because the mean of its divisors is an integer number (5010996859).

Almost surely, 2^10021993717 is an apocalyptic number.

It is an amenable number.

10021993717 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021993717 is an equidigital number, since it uses as much as digits as its factorization.

10021993717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 40.

The spelling of 10021993717 in words is "ten billion, twenty-one million, nine hundred ninety-three thousand, seven hundred seventeen".