21922063 has 2 divisors, whose sum is σ = 21922064. Its totient is φ = 21922062.

The previous prime is 21922051. The next prime is 21922073. The reversal of 21922063 is 36022912.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21922063 - 2²¹ = 19824911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21922073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10961031 + 10961032.

It is an arithmetic number, because the mean of its divisors is an integer number (10961032).

Almost surely, 2^21922063 is an apocalyptic number.

21922063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21922063 is an equidigital number, since it uses as much as digits as its factorization.

21922063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 21922063 is about 4682.1002765853. The cubic root of 21922063 is about 279.8726589321.

Adding to 21922063 its reverse (36022912), we get a palindrome (57944975).

The spelling of 21922063 in words is "twenty-one million, nine hundred twenty-two thousand, sixty-three".