20321131296 has 24 divisors (see below), whose sum is σ = 53342969904. Its totient is φ = 6773710400.

The previous prime is 20321131261. The next prime is 20321131297. The reversal of 20321131296 is 69213112302.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20321131297) 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 3 ways as a sum of consecutive naturals, for example, 105839130 + ... + 105839321.

It is an arithmetic number, because the mean of its divisors is an integer number (2222623746).

Almost surely, 2^20321131296 is an apocalyptic number.

It is an amenable number.

20321131296 is an abundant number, since it is smaller than the sum of its proper divisors (33021838608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321131296 is a wasteful number, since it uses less digits than its factorization.

20321131296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211678464 (or 211678456 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

Adding to 20321131296 its reverse (69213112302), we get a palindrome (89534243598).

The spelling of 20321131296 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred ninety-six".