21330322163 has 2 divisors, whose sum is σ = 21330322164. Its totient is φ = 21330322162.

The previous prime is 21330322157. The next prime is 21330322249. The reversal of 21330322163 is 36122303312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21330322163 - 2⁸ = 21330321907 is a prime.

It is not a weakly prime, because it can be changed into another prime (21330322463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665161081 + 10665161082.

It is an arithmetic number, because the mean of its divisors is an integer number (10665161082).

Almost surely, 2^21330322163 is an apocalyptic number.

21330322163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330322163 is an equidigital number, since it uses as much as digits as its factorization.

21330322163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21330322163 its reverse (36122303312), we get a palindrome (57452625475).

The spelling of 21330322163 in words is "twenty-one billion, three hundred thirty million, three hundred twenty-two thousand, one hundred sixty-three".