20313322331 has 4 divisors (see below), whose sum is σ = 20357772072. Its totient is φ = 20268872592.

The previous prime is 20313322319. The next prime is 20313322357. The reversal of 20313322331 is 13322331302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20313322331 - 2²² = 20309128027 is a prime.

It is a super-2 number, since 2×20313322331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20313322297 and 20313322306.

It is not an unprimeable number, because it can be changed into a prime (20313322361) 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, 22224185 + ... + 22225098.

It is an arithmetic number, because the mean of its divisors is an integer number (5089443018).

Almost surely, 2^20313322331 is an apocalyptic number.

20313322331 is a deficient number, since it is larger than the sum of its proper divisors (44449741).

20313322331 is an equidigital number, since it uses as much as digits as its factorization.

20313322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44449740.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20313322331 its reverse (13322331302), we get a palindrome (33635653633).

The spelling of 20313322331 in words is "twenty billion, three hundred thirteen million, three hundred twenty-two thousand, three hundred thirty-one".