20320003230321 has 16 divisors (see below), whose sum is σ = 27112558834688. Its totient is φ = 13537058774400.

The previous prime is 20320003230221. The next prime is 20320003230379. The reversal of 20320003230321 is 12303230002302.

It is not a de Polignac number, because 20320003230321 - 2¹⁰ = 20320003229297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20320003230221) 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, 271631295 + ... + 271706091.

It is an arithmetic number, because the mean of its divisors is an integer number (1694534927168).

Almost surely, 2^{20320003230321} is an apocalyptic number.

It is an amenable number.

20320003230321 is a deficient number, since it is larger than the sum of its proper divisors (6792555604367).

20320003230321 is a wasteful number, since it uses less digits than its factorization.

20320003230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137832.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20320003230321 its reverse (12303230002302), we get a palindrome (32623233232623).

The spelling of 20320003230321 in words is "twenty trillion, three hundred twenty billion, three million, two hundred thirty thousand, three hundred twenty-one".