20812361917271 has 2 divisors, whose sum is σ = 20812361917272. Its totient is φ = 20812361917270.

The previous prime is 20812361917253. The next prime is 20812361917301. The reversal of 20812361917271 is 17271916321802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20812361917271 - 2¹⁴ = 20812361900887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20812361917201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10406180958635 + 10406180958636.

It is an arithmetic number, because the mean of its divisors is an integer number (10406180958636).

Almost surely, 2^{20812361917271} is an apocalyptic number.

20812361917271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20812361917271 is an equidigital number, since it uses as much as digits as its factorization.

20812361917271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 20812361917271 in words is "twenty trillion, eight hundred twelve billion, three hundred sixty-one million, nine hundred seventeen thousand, two hundred seventy-one".