20312230310021 has 32 divisors (see below), whose sum is σ = 23210288640000. Its totient is φ = 17621329699008.

The previous prime is 20312230309999. The next prime is 20312230310027. The reversal of 20312230310021 is 12001303221302.

It is a cyclic number.

It is not a de Polignac number, because 20312230310021 - 2¹⁸ = 20312230047877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312230309975 and 20312230310002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312230310027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14871530 + ... + 16179828.

It is an arithmetic number, because the mean of its divisors is an integer number (725321520000).

Almost surely, 2^{20312230310021} is an apocalyptic number.

It is an amenable number.

20312230310021 is a deficient number, since it is larger than the sum of its proper divisors (2898058329979).

20312230310021 is a wasteful number, since it uses less digits than its factorization.

20312230310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308833.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20312230310021 its reverse (12001303221302), we get a palindrome (32313533531323).

The spelling of 20312230310021 in words is "twenty trillion, three hundred twelve billion, two hundred thirty million, three hundred ten thousand, twenty-one".