21422422429 has 2 divisors, whose sum is σ = 21422422430. Its totient is φ = 21422422428.

The previous prime is 21422422379. The next prime is 21422422447. The reversal of 21422422429 is 92422422412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13122848025 + 8299574404 = 114555^2 + 91102^2 .

It is a cyclic number.

It is not a de Polignac number, because 21422422429 - 2¹⁷ = 21422291357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21422422394 and 21422422403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422422129) 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, 10711211214 + 10711211215.

It is an arithmetic number, because the mean of its divisors is an integer number (10711211215).

Almost surely, 2^21422422429 is an apocalyptic number.

It is an amenable number.

21422422429 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422422429 is an equidigital number, since it uses as much as digits as its factorization.

21422422429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 34.

The spelling of 21422422429 in words is "twenty-one billion, four hundred twenty-two million, four hundred twenty-two thousand, four hundred twenty-nine".