20323211223 has 32 divisors (see below), whose sum is σ = 32902479360. Its totient is φ = 10909745280.

The previous prime is 20323211179. The next prime is 20323211299. The reversal of 20323211223 is 32211232302.

It is a happy number.

It is not a de Polignac number, because 20323211223 - 2¹⁰ = 20323210199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20323211223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323231223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428433 + ... + 473498.

It is an arithmetic number, because the mean of its divisors is an integer number (1028202480).

Almost surely, 2^20323211223 is an apocalyptic number.

20323211223 is a deficient number, since it is larger than the sum of its proper divisors (12579268137).

20323211223 is a wasteful number, since it uses less digits than its factorization.

20323211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902007.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20323211223 its reverse (32211232302), we get a palindrome (52534443525).

The spelling of 20323211223 in words is "twenty billion, three hundred twenty-three million, two hundred eleven thousand, two hundred twenty-three".