21794844223 has 2 divisors, whose sum is σ = 21794844224. Its totient is φ = 21794844222.

The previous prime is 21794844209. The next prime is 21794844233. The reversal of 21794844223 is 32244849712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21794844223 - 2¹⁷ = 21794713151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21794844233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10897422111 + 10897422112.

It is an arithmetic number, because the mean of its divisors is an integer number (10897422112).

Almost surely, 2^21794844223 is an apocalyptic number.

21794844223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21794844223 is an equidigital number, since it uses as much as digits as its factorization.

21794844223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 46.

The spelling of 21794844223 in words is "twenty-one billion, seven hundred ninety-four million, eight hundred forty-four thousand, two hundred twenty-three".