22504424 has 8 divisors (see below), whose sum is σ = 42195810. Its totient is φ = 11252208.

The previous prime is 22504421. The next prime is 22504453. The reversal of 22504424 is 42440522.

It can be written as a sum of positive squares in only one way, i.e., 18576100 + 3928324 = 4310^2 + 1982^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 22504424.

It is not an unprimeable number, because it can be changed into a prime (22504421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406519 + ... + 1406534.

Almost surely, 2^22504424 is an apocalyptic number.

It is an amenable number.

22504424 is a deficient number, since it is larger than the sum of its proper divisors (19691386).

22504424 is a wasteful number, since it uses less digits than its factorization.

22504424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813059 (or 2813055 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 22504424 is about 4743.8827978777. The cubic root of 22504424 is about 282.3293103113.

Adding to 22504424 its reverse (42440522), we get a palindrome (64944946).

The spelling of 22504424 in words is "twenty-two million, five hundred four thousand, four hundred twenty-four".