20443324211321 has 4 divisors (see below), whose sum is σ = 22301808230544. Its totient is φ = 18584840192100.

The previous prime is 20443324211273. The next prime is 20443324211327. The reversal of 20443324211321 is 12311242334402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20443324211321 - 2⁴² = 16045277700217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443324211327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929242009595 + ... + 929242009616.

It is an arithmetic number, because the mean of its divisors is an integer number (5575452057636).

Almost surely, 2^{20443324211321} is an apocalyptic number.

It is an amenable number.

20443324211321 is a deficient number, since it is larger than the sum of its proper divisors (1858484019223).

20443324211321 is a wasteful number, since it uses less digits than its factorization.

20443324211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858484019222.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 20443324211321 its reverse (12311242334402), we get a palindrome (32754566545723).

The spelling of 20443324211321 in words is "twenty trillion, four hundred forty-three billion, three hundred twenty-four million, two hundred eleven thousand, three hundred twenty-one".