22006530 has 96 divisors (see below), whose sum is σ = 70447104. Its totient is φ = 4641408.

The previous prime is 22006529. The next prime is 22006531. The reversal of 22006530 is 3560022.

22006530 = 873² + 874² + ... + 900².

It is an interprime number because it is at equal distance from previous prime (22006529) and next prime (22006531).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22006531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6847 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (733824).

Almost surely, 2^22006530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22006530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35223552).

22006530 is an abundant number, since it is smaller than the sum of its proper divisors (48440574).

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

22006530 is a wasteful number, since it uses less digits than its factorization.

22006530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720 (or 2717 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 22006530 is about 4691.1118085162. Note that the first 3 decimals coincide. The cubic root of 22006530 is about 280.2316535304.

Adding to 22006530 its reverse (3560022), we get a palindrome (25566552).

The spelling of 22006530 in words is "twenty-two million, six thousand, five hundred thirty".