20564995326103 has 2 divisors, whose sum is σ = 20564995326104. Its totient is φ = 20564995326102.

The previous prime is 20564995326097. The next prime is 20564995326131. The reversal of 20564995326103 is 30162359946502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20564995326103 - 2⁹ = 20564995325591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20564995326193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10282497663051 + 10282497663052.

It is an arithmetic number, because the mean of its divisors is an integer number (10282497663052).

Almost surely, 2^{20564995326103} is an apocalyptic number.

20564995326103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20564995326103 is an equidigital number, since it uses as much as digits as its factorization.

20564995326103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 55.

The spelling of 20564995326103 in words is "twenty trillion, five hundred sixty-four billion, nine hundred ninety-five million, three hundred twenty-six thousand, one hundred three".