20443344310221 has 16 divisors (see below), whose sum is σ = 32225961475200. Its totient is φ = 11279086515648.

The previous prime is 20443344310099. The next prime is 20443344310267. The reversal of 20443344310221 is 12201344334402.

It is not a de Polignac number, because 20443344310221 - 2⁷ = 20443344310093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443344310271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16784354326 + ... + 16784355543.

It is an arithmetic number, because the mean of its divisors is an integer number (2014122592200).

Almost surely, 2^{20443344310221} is an apocalyptic number.

20443344310221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20443344310221 is a deficient number, since it is larger than the sum of its proper divisors (11782617164979).

20443344310221 is a wasteful number, since it uses less digits than its factorization.

20443344310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33568709908.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 20443344310221 its reverse (12201344334402), we get a palindrome (32644688644623).

The spelling of 20443344310221 in words is "twenty trillion, four hundred forty-three billion, three hundred forty-four million, three hundred ten thousand, two hundred twenty-one".