21442303163 has 2 divisors, whose sum is σ = 21442303164. Its totient is φ = 21442303162.

The previous prime is 21442303151. The next prime is 21442303189. The reversal of 21442303163 is 36130324412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21442303163 - 2²⁸ = 21173867707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21442300163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721151581 + 10721151582.

It is an arithmetic number, because the mean of its divisors is an integer number (10721151582).

Almost surely, 2^21442303163 is an apocalyptic number.

21442303163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442303163 is an equidigital number, since it uses as much as digits as its factorization.

21442303163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21442303163 its reverse (36130324412), we get a palindrome (57572627575).

The spelling of 21442303163 in words is "twenty-one billion, four hundred forty-two million, three hundred three thousand, one hundred sixty-three".