20826713773 has 2 divisors, whose sum is σ = 20826713774. Its totient is φ = 20826713772.

The previous prime is 20826713771. The next prime is 20826713857. The reversal of 20826713773 is 37731762802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20585936484 + 240777289 = 143478^2 + 15517^2 .

It is a cyclic number.

It is not a de Polignac number, because 20826713773 - 2¹ = 20826713771 is a prime.

Together with 20826713771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20826713771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10413356886 + 10413356887.

It is an arithmetic number, because the mean of its divisors is an integer number (10413356887).

Almost surely, 2^20826713773 is an apocalyptic number.

It is an amenable number.

20826713773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20826713773 is an equidigital number, since it uses as much as digits as its factorization.

20826713773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 20826713773 in words is "twenty billion, eight hundred twenty-six million, seven hundred thirteen thousand, seven hundred seventy-three".