20223121423 has 4 divisors (see below), whose sum is σ = 20224034208. Its totient is φ = 20222208640.

The previous prime is 20223121421. The next prime is 20223121433. The reversal of 20223121423 is 32412132202.

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 20223121423 - 2¹ = 20223121421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20223121394 and 20223121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223121421) 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, 422311 + ... + 467752.

It is an arithmetic number, because the mean of its divisors is an integer number (5056008552).

Almost surely, 2^20223121423 is an apocalyptic number.

20223121423 is a deficient number, since it is larger than the sum of its proper divisors (912785).

20223121423 is an equidigital number, since it uses as much as digits as its factorization.

20223121423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912784.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20223121423 its reverse (32412132202), we get a palindrome (52635253625).

The spelling of 20223121423 in words is "twenty billion, two hundred twenty-three million, one hundred twenty-one thousand, four hundred twenty-three".