21422242063 has 2 divisors, whose sum is σ = 21422242064. Its totient is φ = 21422242062.

The previous prime is 21422242007. The next prime is 21422242157. The reversal of 21422242063 is 36024222412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21422242063 - 2⁹ = 21422241551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422242003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711121031 + 10711121032.

It is an arithmetic number, because the mean of its divisors is an integer number (10711121032).

Almost surely, 2^21422242063 is an apocalyptic number.

21422242063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422242063 is an equidigital number, since it uses as much as digits as its factorization.

21422242063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21422242063 its reverse (36024222412), we get a palindrome (57446464475).

The spelling of 21422242063 in words is "twenty-one billion, four hundred twenty-two million, two hundred forty-two thousand, sixty-three".