20321331066443 has 8 divisors (see below), whose sum is σ = 22268136124416. Its totient is φ = 18391094562600.

The previous prime is 20321331066433. The next prime is 20321331066473. The reversal of 20321331066443 is 34466013312302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20321331066443 - 2¹⁶ = 20321331000907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321331066397 and 20321331066406.

It is not an unprimeable number, because it can be changed into a prime (20321331066433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4142135963 + ... + 4142140868.

It is an arithmetic number, because the mean of its divisors is an integer number (2783517015552).

Almost surely, 2^{20321331066443} is an apocalyptic number.

20321331066443 is a deficient number, since it is larger than the sum of its proper divisors (1946805057973).

20321331066443 is a wasteful number, since it uses less digits than its factorization.

20321331066443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284277065.

The product of its (nonzero) digits is 186624, while the sum is 38.

Adding to 20321331066443 its reverse (34466013312302), we get a palindrome (54787344378745).

The spelling of 20321331066443 in words is "twenty trillion, three hundred twenty-one billion, three hundred thirty-one million, sixty-six thousand, four hundred forty-three".