21885704070317 has 2 divisors, whose sum is σ = 21885704070318. Its totient is φ = 21885704070316.

The previous prime is 21885704070299. The next prime is 21885704070367. The reversal of 21885704070317 is 71307040758812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20956197906436 + 929506163881 = 4577794^2 + 964109^2 .

It is a cyclic number.

It is not a de Polignac number, because 21885704070317 - 2⁶ = 21885704070253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21885704070367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10942852035158 + 10942852035159.

It is an arithmetic number, because the mean of its divisors is an integer number (10942852035159).

Almost surely, 2^{21885704070317} is an apocalyptic number.

It is an amenable number.

21885704070317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21885704070317 is an equidigital number, since it uses as much as digits as its factorization.

21885704070317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 21885704070317 in words is "twenty-one trillion, eight hundred eighty-five billion, seven hundred four million, seventy thousand, three hundred seventeen".