22520424 has 16 divisors (see below), whose sum is σ = 56301120. Its totient is φ = 7506800.

The previous prime is 22520423. The next prime is 22520431. The reversal of 22520424 is 42402522.

It is a self number, because there is not a number n which added to its sum of digits gives 22520424.

It is not an unprimeable number, because it can be changed into a prime (22520423) 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, 469152 + ... + 469199.

It is an arithmetic number, because the mean of its divisors is an integer number (3518820).

Almost surely, 2^22520424 is an apocalyptic number.

22520424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22520424 is an abundant number, since it is smaller than the sum of its proper divisors (33780696).

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

22520424 is a wasteful number, since it uses less digits than its factorization.

22520424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938360 (or 938356 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22520424 is about 4745.5688805453. The cubic root of 22520424 is about 282.3962038080.

Adding to 22520424 its reverse (42402522), we get a palindrome (64922946).

The spelling of 22520424 in words is "twenty-two million, five hundred twenty thousand, four hundred twenty-four".