20343443191 has 2 divisors, whose sum is σ = 20343443192. Its totient is φ = 20343443190.

The previous prime is 20343443177. The next prime is 20343443207. The reversal of 20343443191 is 19134434302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20343443191 - 2²⁵ = 20309888759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20343443101) 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, 10171721595 + 10171721596.

It is an arithmetic number, because the mean of its divisors is an integer number (10171721596).

Almost surely, 2^20343443191 is an apocalyptic number.

20343443191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343443191 is an equidigital number, since it uses as much as digits as its factorization.

20343443191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 20343443191 its reverse (19134434302), we get a palindrome (39477877493).

The spelling of 20343443191 in words is "twenty billion, three hundred forty-three million, four hundred forty-three thousand, one hundred ninety-one".