20317345767773 has 2 divisors, whose sum is σ = 20317345767774. Its totient is φ = 20317345767772.

The previous prime is 20317345767751. The next prime is 20317345767821. The reversal of 20317345767773 is 37776754371302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18457867172644 + 1859478595129 = 4296262^2 + 1363627^2 .

It is a cyclic number.

It is not a de Polignac number, because 20317345767773 - 2¹⁰ = 20317345766749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20317345767703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158672883886 + 10158672883887.

It is an arithmetic number, because the mean of its divisors is an integer number (10158672883887).

Almost surely, 2^{20317345767773} is an apocalyptic number.

It is an amenable number.

20317345767773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317345767773 is an equidigital number, since it uses as much as digits as its factorization.

20317345767773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108909360, while the sum is 62.

The spelling of 20317345767773 in words is "twenty trillion, three hundred seventeen billion, three hundred forty-five million, seven hundred sixty-seven thousand, seven hundred seventy-three".