20320322331 has 16 divisors (see below), whose sum is σ = 28945424000. Its totient is φ = 12642334848.

The previous prime is 20320322317. The next prime is 20320322353. The reversal of 20320322331 is 13322302302.

It is not a de Polignac number, because 20320322331 - 2⁵ = 20320322299 is a prime.

It is a super-2 number, since 2×20320322331² (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 = 20320322298 and 20320322307.

It is not an unprimeable number, because it can be changed into a prime (20320322311) 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 15 ways as a sum of consecutive naturals, for example, 2656606 + ... + 2664243.

It is an arithmetic number, because the mean of its divisors is an integer number (1809089000).

Almost surely, 2^20320322331 is an apocalyptic number.

20320322331 is a deficient number, since it is larger than the sum of its proper divisors (8625101669).

20320322331 is a wasteful number, since it uses less digits than its factorization.

20320322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5320938.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20320322331 its reverse (13322302302), we get a palindrome (33642624633).

The spelling of 20320322331 in words is "twenty billion, three hundred twenty million, three hundred twenty-two thousand, three hundred thirty-one".