20343122171 has 2 divisors, whose sum is σ = 20343122172. Its totient is φ = 20343122170.

The previous prime is 20343122153. The next prime is 20343122207. The reversal of 20343122171 is 17122134302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20343122171 - 2¹⁰ = 20343121147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20343122171.

It is not a weakly prime, because it can be changed into another prime (20343122671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171561085 + 10171561086.

It is an arithmetic number, because the mean of its divisors is an integer number (10171561086).

Almost surely, 2^20343122171 is an apocalyptic number.

20343122171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343122171 is an equidigital number, since it uses as much as digits as its factorization.

20343122171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 20343122171 its reverse (17122134302), we get a palindrome (37465256473).

The spelling of 20343122171 in words is "twenty billion, three hundred forty-three million, one hundred twenty-two thousand, one hundred seventy-one".