22019424 has 144 divisors (see below), whose sum is σ = 69866496. Its totient is φ = 6048000.

The previous prime is 22019411. The next prime is 22019429. The reversal of 22019424 is 42491022.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 22019394 and 22019403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22019429) 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, 145749 + ... + 145899.

It is an arithmetic number, because the mean of its divisors is an integer number (485184).

Almost surely, 2^22019424 is an apocalyptic number.

22019424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22019424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34933248).

22019424 is an abundant number, since it is smaller than the sum of its proper divisors (47847072).

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

22019424 is a wasteful number, since it uses less digits than its factorization.

22019424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 22019424 is about 4692.4859083433. The cubic root of 22019424 is about 280.2863736744.

The spelling of 22019424 in words is "twenty-two million, nineteen thousand, four hundred twenty-four".