20343330221 has 2 divisors, whose sum is σ = 20343330222. Its totient is φ = 20343330220.

The previous prime is 20343330151. The next prime is 20343330257. The reversal of 20343330221 is 12203334302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19090948900 + 1252381321 = 138170^2 + 35389^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343330221 - 2¹⁸ = 20343068077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20343350221) 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, 10171665110 + 10171665111.

It is an arithmetic number, because the mean of its divisors is an integer number (10171665111).

Almost surely, 2^20343330221 is an apocalyptic number.

It is an amenable number.

20343330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343330221 is an equidigital number, since it uses as much as digits as its factorization.

20343330221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20343330221 its reverse (12203334302), we get a palindrome (32546664523).

The spelling of 20343330221 in words is "twenty billion, three hundred forty-three million, three hundred thirty thousand, two hundred twenty-one".