20812363752317 has 2 divisors, whose sum is σ = 20812363752318. Its totient is φ = 20812363752316.

The previous prime is 20812363752251. The next prime is 20812363752329. The reversal of 20812363752317 is 71325736321802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15261726703876 + 5550637048441 = 3906626^2 + 2355979^2 .

It is a cyclic number.

It is not a de Polignac number, because 20812363752317 - 2¹⁸ = 20812363490173 is a prime.

It is a super-2 number, since 2×20812363752317² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20812363752377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10406181876158 + 10406181876159.

It is an arithmetic number, because the mean of its divisors is an integer number (10406181876159).

Almost surely, 2^{20812363752317} is an apocalyptic number.

It is an amenable number.

20812363752317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20812363752317 is an equidigital number, since it uses as much as digits as its factorization.

20812363752317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 20812363752317 in words is "twenty trillion, eight hundred twelve billion, three hundred sixty-three million, seven hundred fifty-two thousand, three hundred seventeen".