22140421320 has 128 divisors (see below), whose sum is σ = 67443425280. Its totient is φ = 5813472000.

The previous prime is 22140421313. The next prime is 22140421321. The reversal of 22140421320 is 2312404122.

It is a super-2 number, since 2×22140421320² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22140421321) 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, 10487065 + ... + 10489175.

It is an arithmetic number, because the mean of its divisors is an integer number (526901760).

Almost surely, 2^22140421320 is an apocalyptic number.

22140421320 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 22140421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33721712640).

22140421320 is an abundant number, since it is smaller than the sum of its proper divisors (45303003960).

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

22140421320 is a wasteful number, since it uses less digits than its factorization.

22140421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427 (or 3423 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22140421320 its reverse (2312404122), we get a palindrome (24452825442).

The spelling of 22140421320 in words is "twenty-two billion, one hundred forty million, four hundred twenty-one thousand, three hundred twenty".