20323223311 has 4 divisors (see below), whose sum is σ = 20325475800. Its totient is φ = 20320970824.

The previous prime is 20323223309. The next prime is 20323223317. The reversal of 20323223311 is 11332232302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11332232302 = 2 ⋅5666116151.

It is a cyclic number.

It is not a de Polignac number, because 20323223311 - 2¹ = 20323223309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323223317) 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, 1112656 + ... + 1130773.

It is an arithmetic number, because the mean of its divisors is an integer number (5081368950).

Almost surely, 2^20323223311 is an apocalyptic number.

20323223311 is a deficient number, since it is larger than the sum of its proper divisors (2252489).

20323223311 is an equidigital number, since it uses as much as digits as its factorization.

20323223311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252488.

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

Adding to 20323223311 its reverse (11332232302), we get a palindrome (31655455613).

The spelling of 20323223311 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-three thousand, three hundred eleven".