20127170243539 has 2 divisors, whose sum is σ = 20127170243540. Its totient is φ = 20127170243538.

The previous prime is 20127170243501. The next prime is 20127170243561. The reversal of 20127170243539 is 93534207172102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20127170243539 - 2¹¹ = 20127170241491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20127170243569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10063585121769 + 10063585121770.

It is an arithmetic number, because the mean of its divisors is an integer number (10063585121770).

Almost surely, 2^{20127170243539} is an apocalyptic number.

20127170243539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20127170243539 is an equidigital number, since it uses as much as digits as its factorization.

20127170243539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 20127170243539 in words is "twenty trillion, one hundred twenty-seven billion, one hundred seventy million, two hundred forty-three thousand, five hundred thirty-nine".