20345363742317 has 2 divisors, whose sum is σ = 20345363742318. Its totient is φ = 20345363742316.

The previous prime is 20345363742299. The next prime is 20345363742331. The reversal of 20345363742317 is 71324736354302.

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., 19987641328516 + 357722413801 = 4470754^2 + 598099^2 .

It is a cyclic number.

It is not a de Polignac number, because 20345363742317 - 2⁸ = 20345363742061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20345363742367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172681871158 + 10172681871159.

It is an arithmetic number, because the mean of its divisors is an integer number (10172681871159).

Almost surely, 2^{20345363742317} is an apocalyptic number.

It is an amenable number.

20345363742317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345363742317 is an equidigital number, since it uses as much as digits as its factorization.

20345363742317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 50.

The spelling of 20345363742317 in words is "twenty trillion, three hundred forty-five billion, three hundred sixty-three million, seven hundred forty-two thousand, three hundred seventeen".