20716457711 has 2 divisors, whose sum is σ = 20716457712. Its totient is φ = 20716457710.

The previous prime is 20716457693. The next prime is 20716457809. The reversal of 20716457711 is 11775461702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20716457711 - 2¹⁰ = 20716456687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20716457611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10358228855 + 10358228856.

It is an arithmetic number, because the mean of its divisors is an integer number (10358228856).

Almost surely, 2^20716457711 is an apocalyptic number.

20716457711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20716457711 is an equidigital number, since it uses as much as digits as its factorization.

20716457711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 20716457711 in words is "twenty billion, seven hundred sixteen million, four hundred fifty-seven thousand, seven hundred eleven".