20525795922857 has 2 divisors, whose sum is σ = 20525795922858. Its totient is φ = 20525795922856.

The previous prime is 20525795922781. The next prime is 20525795922871. The reversal of 20525795922857 is 75822959752502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12315158415616 + 8210637507241 = 3509296^2 + 2865421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20525795922857 is a prime.

It is not a weakly prime, because it can be changed into another prime (20525795922557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262897961428 + 10262897961429.

It is an arithmetic number, because the mean of its divisors is an integer number (10262897961429).

Almost surely, 2^{20525795922857} is an apocalyptic number.

It is an amenable number.

20525795922857 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525795922857 is an equidigital number, since it uses as much as digits as its factorization.

20525795922857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520000, while the sum is 68.

The spelling of 20525795922857 in words is "twenty trillion, five hundred twenty-five billion, seven hundred ninety-five million, nine hundred twenty-two thousand, eight hundred fifty-seven".