21342344143 has 2 divisors, whose sum is σ = 21342344144. Its totient is φ = 21342344142.

The previous prime is 21342344137. The next prime is 21342344183. The reversal of 21342344143 is 34144324312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21342344143 - 2²⁹ = 20805473231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21342344113) 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, 10671172071 + 10671172072.

It is an arithmetic number, because the mean of its divisors is an integer number (10671172072).

Almost surely, 2^21342344143 is an apocalyptic number.

21342344143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342344143 is an equidigital number, since it uses as much as digits as its factorization.

21342344143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 31.

Adding to 21342344143 its reverse (34144324312), we get a palindrome (55486668455).

The spelling of 21342344143 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-four thousand, one hundred forty-three".