20123133223 has 4 divisors (see below), whose sum is σ = 21306846960. Its totient is φ = 18939419488.

The previous prime is 20123133203. The next prime is 20123133229. The reversal of 20123133223 is 32233132102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20123133223 - 2²¹ = 20121036071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123133194 and 20123133203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123133229) 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, 591856843 + ... + 591856876.

It is an arithmetic number, because the mean of its divisors is an integer number (5326711740).

Almost surely, 2^20123133223 is an apocalyptic number.

20123133223 is a deficient number, since it is larger than the sum of its proper divisors (1183713737).

20123133223 is a wasteful number, since it uses less digits than its factorization.

20123133223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183713736.

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

Adding to 20123133223 its reverse (32233132102), we get a palindrome (52356265325).

The spelling of 20123133223 in words is "twenty billion, one hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty-three".