21743247574441 has 2 divisors, whose sum is σ = 21743247574442. Its totient is φ = 21743247574440.

The previous prime is 21743247574357. The next prime is 21743247574459. The reversal of 21743247574441 is 14447574234712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16553831449600 + 5189416124841 = 4068640^2 + 2278029^2 .

It is a cyclic number.

It is not a de Polignac number, because 21743247574441 - 2¹¹ = 21743247572393 is a prime.

It is not a weakly prime, because it can be changed into another prime (21743247574471) 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, 10871623787220 + 10871623787221.

It is an arithmetic number, because the mean of its divisors is an integer number (10871623787221).

Almost surely, 2^{21743247574441} is an apocalyptic number.

It is an amenable number.

21743247574441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21743247574441 is an equidigital number, since it uses as much as digits as its factorization.

21743247574441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21073920, while the sum is 55.

The spelling of 21743247574441 in words is "twenty-one trillion, seven hundred forty-three billion, two hundred forty-seven million, five hundred seventy-four thousand, four hundred forty-one".