21743401513 has 2 divisors, whose sum is σ = 21743401514. Its totient is φ = 21743401512.

The previous prime is 21743401501. The next prime is 21743401571. The reversal of 21743401513 is 31510434712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13464585369 + 8278816144 = 116037^2 + 90988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21743401513 is a prime.

It is not a weakly prime, because it can be changed into another prime (21743401213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871700756 + 10871700757.

It is an arithmetic number, because the mean of its divisors is an integer number (10871700757).

Almost surely, 2^21743401513 is an apocalyptic number.

It is an amenable number.

21743401513 is a deficient number, since it is larger than the sum of its proper divisors (1).

21743401513 is an equidigital number, since it uses as much as digits as its factorization.

21743401513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 21743401513 in words is "twenty-one billion, seven hundred forty-three million, four hundred one thousand, five hundred thirteen".