21302242163 has 2 divisors, whose sum is σ = 21302242164. Its totient is φ = 21302242162.

The previous prime is 21302242127. The next prime is 21302242211. The reversal of 21302242163 is 36124220312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302242163 - 2¹⁶ = 21302176627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21302242123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651121081 + 10651121082.

It is an arithmetic number, because the mean of its divisors is an integer number (10651121082).

Almost surely, 2^21302242163 is an apocalyptic number.

21302242163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302242163 is an equidigital number, since it uses as much as digits as its factorization.

21302242163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21302242163 its reverse (36124220312), we get a palindrome (57426462475).

The spelling of 21302242163 in words is "twenty-one billion, three hundred two million, two hundred forty-two thousand, one hundred sixty-three".