20321022331 has 6 divisors (see below), whose sum is σ = 20828747396. Its totient is φ = 19825386000.

The previous prime is 20321022299. The next prime is 20321022343. The reversal of 20321022331 is 13322012302.

It is not a de Polignac number, because 20321022331 - 2⁵ = 20321022299 is a prime.

It is a super-2 number, since 2×20321022331² (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 = 20321022299 and 20321022308.

It is not an unprimeable number, because it can be changed into a prime (20321022391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6042645 + ... + 6046006.

Almost surely, 2^20321022331 is an apocalyptic number.

20321022331 is a deficient number, since it is larger than the sum of its proper divisors (507725065).

20321022331 is an equidigital number, since it uses as much as digits as its factorization.

20321022331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12088733 (or 12088692 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20321022331 its reverse (13322012302), we get a palindrome (33643034633).

The spelling of 20321022331 in words is "twenty billion, three hundred twenty-one million, twenty-two thousand, three hundred thirty-one".