22143404140 has 216 divisors, whose sum is σ = 57286217520. Its totient is φ = 7172605440.

The previous prime is 22143404131. The next prime is 22143404147. The reversal of 22143404140 is 4140434122.

It is not an unprimeable number, because it can be changed into a prime (22143404147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11859487 + ... + 11861353.

It is an arithmetic number, because the mean of its divisors is an integer number (265213970).

Almost surely, 2^22143404140 is an apocalyptic number.

22143404140 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 22143404140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28643108760).

22143404140 is an abundant number, since it is smaller than the sum of its proper divisors (35142813380).

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

22143404140 is a wasteful number, since it uses less digits than its factorization.

22143404140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 22143404140 its reverse (4140434122), we get a palindrome (26283838262).

The spelling of 22143404140 in words is "twenty-two billion, one hundred forty-three million, four hundred four thousand, one hundred forty".