21742633704317 has 2 divisors, whose sum is σ = 21742633704318. Its totient is φ = 21742633704316.

The previous prime is 21742633704299. The next prime is 21742633704331. The reversal of 21742633704317 is 71340733624712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12052742550436 + 9689891153881 = 3471706^2 + 3112859^2 .

It is a cyclic number.

It is not a de Polignac number, because 21742633704317 - 2¹⁴ = 21742633687933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21742633700317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871316852158 + 10871316852159.

It is an arithmetic number, because the mean of its divisors is an integer number (10871316852159).

Almost surely, 2^{21742633704317} is an apocalyptic number.

It is an amenable number.

21742633704317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21742633704317 is an equidigital number, since it uses as much as digits as its factorization.

21742633704317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 50.

The spelling of 21742633704317 in words is "twenty-one trillion, seven hundred forty-two billion, six hundred thirty-three million, seven hundred four thousand, three hundred seventeen".