22424 has 8 divisors (see below), whose sum is σ = 42060. Its totient is φ = 11208.

The previous prime is 22409. The next prime is 22433. The reversal of 22424 is 42422.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 22399 and 22408.

It is a congruent number.

It is an unprimeable number.

22424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394 + ... + 1409.

2²²⁴²⁴ is an apocalyptic number.

It is an amenable number.

22424 is a deficient number, since it is larger than the sum of its proper divisors (19636).

22424 is a wasteful number, since it uses less digits than its factorization.

22424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809 (or 2805 counting only the distinct ones).

The product of its digits is 128, while the sum is 14.

The square root of 22424 is about 149.7464523787. The cubic root of 22424 is about 28.1992589045.

Adding to 22424 its reverse (42422), we get a palindrome (64846).

The spelling of 22424 in words is "twenty-two thousand, four hundred twenty-four", and thus it is an iban number.