20031020230321 has 4 divisors (see below), whose sum is σ = 20031040274944. Its totient is φ = 20031000185700.

The previous prime is 20031020230289. The next prime is 20031020230367. The reversal of 20031020230321 is 12303202013002.

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 20031020230321 - 2⁵ = 20031020230289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031020233321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8440065 + ... + 10549726.

It is an arithmetic number, because the mean of its divisors is an integer number (5007760068736).

Almost surely, 2^{20031020230321} is an apocalyptic number.

It is an amenable number.

20031020230321 is a deficient number, since it is larger than the sum of its proper divisors (20044623).

20031020230321 is a wasteful number, since it uses less digits than its factorization.

20031020230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20044622.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20031020230321 its reverse (12303202013002), we get a palindrome (32334222243323).

The spelling of 20031020230321 in words is "twenty trillion, thirty-one billion, twenty million, two hundred thirty thousand, three hundred twenty-one".