20123320223 has 16 divisors (see below), whose sum is σ = 22646257920. Its totient is φ = 17768543616.

The previous prime is 20123320219. The next prime is 20123320229. The reversal of 20123320223 is 32202332102.

It is not a de Polignac number, because 20123320223 - 2² = 20123320219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123320195 and 20123320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123320229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269165 + ... + 335702.

It is an arithmetic number, because the mean of its divisors is an integer number (1415391120).

Almost surely, 2^20123320223 is an apocalyptic number.

20123320223 is a deficient number, since it is larger than the sum of its proper divisors (2522937697).

20123320223 is a wasteful number, since it uses less digits than its factorization.

20123320223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605006.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20123320223 its reverse (32202332102), we get a palindrome (52325652325).

The spelling of 20123320223 in words is "twenty billion, one hundred twenty-three million, three hundred twenty thousand, two hundred twenty-three".