20564995326097 has 2 divisors, whose sum is σ = 20564995326098. Its totient is φ = 20564995326096.

The previous prime is 20564995326013. The next prime is 20564995326103. The reversal of 20564995326097 is 79062359946502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17557767659601 + 3007227666496 = 4190199^2 + 1734136^2 .

It is a cyclic number.

It is not a de Polignac number, because 20564995326097 - 2¹⁵ = 20564995293329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20564995426097) 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, 10282497663048 + 10282497663049.

It is an arithmetic number, because the mean of its divisors is an integer number (10282497663049).

Almost surely, 2^{20564995326097} is an apocalyptic number.

It is an amenable number.

20564995326097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20564995326097 is an equidigital number, since it uses as much as digits as its factorization.

20564995326097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220449600, while the sum is 67.

The spelling of 20564995326097 in words is "twenty trillion, five hundred sixty-four billion, nine hundred ninety-five million, three hundred twenty-six thousand, ninety-seven".