20013721544143 has 2 divisors, whose sum is σ = 20013721544144. Its totient is φ = 20013721544142.

The previous prime is 20013721544123. The next prime is 20013721544209. The reversal of 20013721544143 is 34144512731002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013721544143 - 2¹⁷ = 20013721413071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013721544123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006860772071 + 10006860772072.

It is an arithmetic number, because the mean of its divisors is an integer number (10006860772072).

Almost surely, 2^{20013721544143} is an apocalyptic number.

20013721544143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013721544143 is an equidigital number, since it uses as much as digits as its factorization.

20013721544143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 20013721544143 in words is "twenty trillion, thirteen billion, seven hundred twenty-one million, five hundred forty-four thousand, one hundred forty-three".