21743247574459 has 2 divisors, whose sum is σ = 21743247574460. Its totient is φ = 21743247574458.

The previous prime is 21743247574441. The next prime is 21743247574471. The reversal of 21743247574459 is 95447574234712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21743247574459 - 2⁹ = 21743247573947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21743247574459.

It is not a weakly prime, because it can be changed into another prime (21743247575459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871623787229 + 10871623787230.

It is an arithmetic number, because the mean of its divisors is an integer number (10871623787230).

Almost surely, 2^{21743247574459} is an apocalyptic number.

21743247574459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21743247574459 is an equidigital number, since it uses as much as digits as its factorization.

21743247574459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 237081600, while the sum is 64.

The spelling of 21743247574459 in words is "twenty-one trillion, seven hundred forty-three billion, two hundred forty-seven million, five hundred seventy-four thousand, four hundred fifty-nine".