21433173163 has 2 divisors, whose sum is σ = 21433173164. Its totient is φ = 21433173162.

The previous prime is 21433173133. The next prime is 21433173191. The reversal of 21433173163 is 36137133412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21433173163 - 2¹⁷ = 21433042091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433173133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716586581 + 10716586582.

It is an arithmetic number, because the mean of its divisors is an integer number (10716586582).

Almost surely, 2^21433173163 is an apocalyptic number.

21433173163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433173163 is an equidigital number, since it uses as much as digits as its factorization.

21433173163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

The spelling of 21433173163 in words is "twenty-one billion, four hundred thirty-three million, one hundred seventy-three thousand, one hundred sixty-three".