22180424 has 16 divisors (see below), whose sum is σ = 47529600. Its totient is φ = 9505872.

The previous prime is 22180421. The next prime is 22180453. The reversal of 22180424 is 42408122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22180424.

It is not an unprimeable number, because it can be changed into a prime (22180421) 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, 197984 + ... + 198095.

It is an arithmetic number, because the mean of its divisors is an integer number (2970600).

Almost surely, 2^22180424 is an apocalyptic number.

It is an amenable number.

22180424 is an abundant number, since it is smaller than the sum of its proper divisors (25349176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22180424 is a wasteful number, since it uses less digits than its factorization.

22180424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396092 (or 396088 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 22180424 is about 4709.6097502872. The cubic root of 22180424 is about 280.9678412052.

Adding to 22180424 its reverse (42408122), we get a palindrome (64588546).

The spelling of 22180424 in words is "twenty-two million, one hundred eighty thousand, four hundred twenty-four".