22042530 has 96 divisors (see below), whose sum is σ = 61012224. Its totient is φ = 5723136.

The previous prime is 22042511. The next prime is 22042547. The reversal of 22042530 is 3524022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114114 + ... + 114306.

It is an arithmetic number, because the mean of its divisors is an integer number (635544).

Almost surely, 2^22042530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22042530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30506112).

22042530 is an abundant number, since it is smaller than the sum of its proper divisors (38969694).

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

22042530 is a wasteful number, since it uses less digits than its factorization.

22042530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22042530 is about 4694.9472840491. The cubic root of 22042530 is about 280.3843785537.

Adding to 22042530 its reverse (3524022), we get a palindrome (25566552).

The spelling of 22042530 in words is "twenty-two million, forty-two thousand, five hundred thirty".