20123031223 has 16 divisors (see below), whose sum is σ = 22240184256. Its totient is φ = 18110118400.

The previous prime is 20123031217. The next prime is 20123031259. The reversal of 20123031223 is 32213032102.

It is a cyclic number.

It is not a de Polignac number, because 20123031223 - 2²⁹ = 19586160311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123031223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123031263) 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, 1656873 + ... + 1668973.

It is an arithmetic number, because the mean of its divisors is an integer number (1390011516).

Almost surely, 2^20123031223 is an apocalyptic number.

20123031223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20123031223 is a deficient number, since it is larger than the sum of its proper divisors (2117153033).

20123031223 is a wasteful number, since it uses less digits than its factorization.

20123031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16394.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20123031223 its reverse (32213032102), we get a palindrome (52336063325).

The spelling of 20123031223 in words is "twenty billion, one hundred twenty-three million, thirty-one thousand, two hundred twenty-three".