20311023321 has 32 divisors (see below), whose sum is σ = 30829075200. Its totient is φ = 13212218880.

The previous prime is 20311023311. The next prime is 20311023323. The reversal of 20311023321 is 12332011302.

20311023321 is a `hidden beast` number, since 20 + 311 + 0 + 2 + 332 + 1 = 666.

It is not a de Polignac number, because 20311023321 - 2²³ = 20302634713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20311023294 and 20311023303.

It is not an unprimeable number, because it can be changed into a prime (20311023323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131335 + ... + 240563.

It is an arithmetic number, because the mean of its divisors is an integer number (963408600).

Almost surely, 2^20311023321 is an apocalyptic number.

It is an amenable number.

20311023321 is a deficient number, since it is larger than the sum of its proper divisors (10518051879).

20311023321 is a wasteful number, since it uses less digits than its factorization.

20311023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109406 (or 109400 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20311023321 its reverse (12332011302), we get a palindrome (32643034623).

The spelling of 20311023321 in words is "twenty billion, three hundred eleven million, twenty-three thousand, three hundred twenty-one".