20023404223 has 4 divisors (see below), whose sum is σ = 20028025440. Its totient is φ = 20018783008.

The previous prime is 20023404157. The next prime is 20023404251. The reversal of 20023404223 is 32240432002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32240432002 = 2 ⋅16120216001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20023404223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20023404194 and 20023404203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023404263) 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, 2304103 + ... + 2312776.

It is an arithmetic number, because the mean of its divisors is an integer number (5007006360).

Almost surely, 2^20023404223 is an apocalyptic number.

20023404223 is a deficient number, since it is larger than the sum of its proper divisors (4621217).

20023404223 is an equidigital number, since it uses as much as digits as its factorization.

20023404223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621216.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20023404223 its reverse (32240432002), we get a palindrome (52263836225).

The spelling of 20023404223 in words is "twenty billion, twenty-three million, four hundred four thousand, two hundred twenty-three".