22024420 has 72 divisors (see below), whose sum is σ = 53625600. Its totient is φ = 7571520.

The previous prime is 22024399. The next prime is 22024423. The reversal of 22024420 is 2442022.

It is a junction number, because it is equal to n+sod(n) for n = 22024394 and 22024403.

It is not an unprimeable number, because it can be changed into a prime (22024423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45741 + ... + 46219.

It is an arithmetic number, because the mean of its divisors is an integer number (744800).

Almost surely, 2^22024420 is an apocalyptic number.

22024420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

22024420 is the 3832-nd pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22024420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26812800).

22024420 is an abundant number, since it is smaller than the sum of its proper divisors (31601180).

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

22024420 is a wasteful number, since it uses less digits than its factorization.

22024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22024420 is about 4693.0182185881. The cubic root of 22024420 is about 280.3075701845.

Adding to 22024420 its reverse (2442022), we get a palindrome (24466442).

The spelling of 22024420 in words is "twenty-two million, twenty-four thousand, four hundred twenty".