20708885705471 has 2 divisors, whose sum is σ = 20708885705472. Its totient is φ = 20708885705470.

The previous prime is 20708885705441. The next prime is 20708885705491. The reversal of 20708885705471 is 17450758880702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20708885705471 - 2²² = 20708881511167 is a prime.

It is a super-3 number, since 3×20708885705471³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20708885705441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10354442852735 + 10354442852736.

It is an arithmetic number, because the mean of its divisors is an integer number (10354442852736).

Almost surely, 2^{20708885705471} is an apocalyptic number.

20708885705471 is a deficient number, since it is larger than the sum of its proper divisors (1).

20708885705471 is an equidigital number, since it uses as much as digits as its factorization.

20708885705471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35123200, while the sum is 62.

The spelling of 20708885705471 in words is "twenty trillion, seven hundred eight billion, eight hundred eighty-five million, seven hundred five thousand, four hundred seventy-one".