20013243767191 has 2 divisors, whose sum is σ = 20013243767192. Its totient is φ = 20013243767190.

The previous prime is 20013243767159. The next prime is 20013243767353. The reversal of 20013243767191 is 19176734231002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013243767191 - 2⁵ = 20013243767159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013243767591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006621883595 + 10006621883596.

It is an arithmetic number, because the mean of its divisors is an integer number (10006621883596).

Almost surely, 2^{20013243767191} is an apocalyptic number.

20013243767191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013243767191 is an equidigital number, since it uses as much as digits as its factorization.

20013243767191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

Adding to 20013243767191 its reverse (19176734231002), we get a palindrome (39189977998193).

The spelling of 20013243767191 in words is "twenty trillion, thirteen billion, two hundred forty-three million, seven hundred sixty-seven thousand, one hundred ninety-one".