22530240440 has 128 divisors (see below), whose sum is σ = 53070716160. Its totient is φ = 8601513984.

The previous prime is 22530240401. The next prime is 22530240449. The reversal of 22530240440 is 4404203522.

It is a happy number.

It is a super-2 number, since 2×22530240440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22530240449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13846907 + ... + 13848533.

It is an arithmetic number, because the mean of its divisors is an integer number (414614970).

Almost surely, 2^22530240440 is an apocalyptic number.

22530240440 is a gapful number since it is divisible by the number (20) 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 22530240440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26535358080).

22530240440 is an abundant number, since it is smaller than the sum of its proper divisors (30540475720).

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

22530240440 is a wasteful number, since it uses less digits than its factorization.

22530240440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 22530240440 its reverse (4404203522), we get a palindrome (26934443962).

The spelling of 22530240440 in words is "twenty-two billion, five hundred thirty million, two hundred forty thousand, four hundred forty".