22132222440 has 128 divisors (see below), whose sum is σ = 66799797120. Its totient is φ = 5866214400.

The previous prime is 22132222433. The next prime is 22132222451. The reversal of 22132222440 is 4422223122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22132222440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26957230 + ... + 26958050.

It is an arithmetic number, because the mean of its divisors is an integer number (521873415).

Almost surely, 2^22132222440 is an apocalyptic number.

22132222440 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 22132222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33399898560).

22132222440 is an abundant number, since it is smaller than the sum of its proper divisors (44667574680).

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

22132222440 is a wasteful number, since it uses less digits than its factorization.

22132222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22132222440 its reverse (4422223122), we get a palindrome (26554445562).

The spelling of 22132222440 in words is "twenty-two billion, one hundred thirty-two million, two hundred twenty-two thousand, four hundred forty".