20313020321 has 24 divisors (see below), whose sum is σ = 22496577600. Its totient is φ = 18327085920.

The previous prime is 20313020297. The next prime is 20313020339. The reversal of 20313020321 is 12302031302.

It is not a de Polignac number, because 20313020321 - 2⁶ = 20313020257 is a prime.

It is a super-2 number, since 2×20313020321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20313020321.

It is not an unprimeable number, because it can be changed into a prime (20313020341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12592511 + ... + 12594123.

It is an arithmetic number, because the mean of its divisors is an integer number (937357400).

Almost surely, 2^20313020321 is an apocalyptic number.

It is an amenable number.

20313020321 is a deficient number, since it is larger than the sum of its proper divisors (2183557279).

20313020321 is a wasteful number, since it uses less digits than its factorization.

20313020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357 (or 2346 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20313020321 its reverse (12302031302), we get a palindrome (32615051623).

The spelling of 20313020321 in words is "twenty billion, three hundred thirteen million, twenty thousand, three hundred twenty-one".