22204423 has 4 divisors (see below), whose sum is σ = 22222768. Its totient is φ = 22186080.

The previous prime is 22204421. The next prime is 22204433. The reversal of 22204423 is 32440222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32440222 = 2 ⋅16220111.

It is a cyclic number.

It is not a de Polignac number, because 22204423 - 2¹ = 22204421 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 22204423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22204421) 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, 7218 + ... + 9823.

It is an arithmetic number, because the mean of its divisors is an integer number (5555692).

Almost surely, 2^22204423 is an apocalyptic number.

22204423 is a deficient number, since it is larger than the sum of its proper divisors (18345).

22204423 is a wasteful number, since it uses less digits than its factorization.

22204423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18344.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22204423 is about 4712.1569371149. The cubic root of 22204423 is about 281.0691394904.

Adding to 22204423 its reverse (32440222), we get a palindrome (54644645).

The spelling of 22204423 in words is "twenty-two million, two hundred four thousand, four hundred twenty-three".