20322231331 has 4 divisors (see below), whose sum is σ = 20705669712. Its totient is φ = 19938792952.

The previous prime is 20322231289. The next prime is 20322231343. The reversal of 20322231331 is 13313222302.

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 20322231331 - 2⁷ = 20322231203 is a prime.

It is a super-2 number, since 2×20322231331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20322231361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191719111 + ... + 191719216.

It is an arithmetic number, because the mean of its divisors is an integer number (5176417428).

Almost surely, 2^20322231331 is an apocalyptic number.

20322231331 is a deficient number, since it is larger than the sum of its proper divisors (383438381).

20322231331 is an equidigital number, since it uses as much as digits as its factorization.

20322231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383438380.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20322231331 its reverse (13313222302), we get a palindrome (33635453633).

The spelling of 20322231331 in words is "twenty billion, three hundred twenty-two million, two hundred thirty-one thousand, three hundred thirty-one".