20321111223 has 64 divisors (see below), whose sum is σ = 34739435520. Its totient is φ = 11499998976.

The previous prime is 20321111203. The next prime is 20321111281. The reversal of 20321111223 is 32211112302.

It is not a de Polignac number, because 20321111223 - 2⁵ = 20321111191 is a prime.

It is a super-2 number, since 2×20321111223² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20321111196 and 20321111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321111203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16752165 + ... + 16753377.

It is an arithmetic number, because the mean of its divisors is an integer number (542803680).

Almost surely, 2^20321111223 is an apocalyptic number.

20321111223 is a deficient number, since it is larger than the sum of its proper divisors (14418324297).

20321111223 is a wasteful number, since it uses less digits than its factorization.

20321111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20321111223 its reverse (32211112302), we get a palindrome (52532223525).

The spelling of 20321111223 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, two hundred twenty-three".