20013243766823 has 2 divisors, whose sum is σ = 20013243766824. Its totient is φ = 20013243766822.

The previous prime is 20013243766787. The next prime is 20013243766829. The reversal of 20013243766823 is 32866734231002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20013243766823 - 2⁶ = 20013243766759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013243766829) 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, 10006621883411 + 10006621883412.

It is an arithmetic number, because the mean of its divisors is an integer number (10006621883412).

Almost surely, 2^{20013243766823} is an apocalyptic number.

20013243766823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013243766823 is an equidigital number, since it uses as much as digits as its factorization.

20013243766823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 47.

Adding to 20013243766823 its reverse (32866734231002), we get a palindrome (52879977997825).

The spelling of 20013243766823 in words is "twenty trillion, thirteen billion, two hundred forty-three million, seven hundred sixty-six thousand, eight hundred twenty-three".