21924466442869 has 2 divisors, whose sum is σ = 21924466442870. Its totient is φ = 21924466442868.

The previous prime is 21924466442831. The next prime is 21924466442917. The reversal of 21924466442869 is 96824466442912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15680514978769 + 6243951464100 = 3959863^2 + 2498790^2 .

It is a cyclic number.

It is not a de Polignac number, because 21924466442869 - 2⁷ = 21924466442741 is a prime.

It is a super-2 number, since 2×21924466442869² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21924466442819) 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, 10962233221434 + 10962233221435.

It is an arithmetic number, because the mean of its divisors is an integer number (10962233221435).

Almost surely, 2^{21924466442869} is an apocalyptic number.

It is an amenable number.

21924466442869 is a deficient number, since it is larger than the sum of its proper divisors (1).

21924466442869 is an equidigital number, since it uses as much as digits as its factorization.

21924466442869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 286654464, while the sum is 67.

The spelling of 21924466442869 in words is "twenty-one trillion, nine hundred twenty-four billion, four hundred sixty-six million, four hundred forty-two thousand, eight hundred sixty-nine".