22331333440 has 112 divisors (see below), whose sum is σ = 57426953472. Its totient is φ = 8222386176.

The previous prime is 22331333377. The next prime is 22331333459. The reversal of 22331333440 is 4433313322.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22331333399 and 22331333408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1519407 + ... + 1534033.

It is an arithmetic number, because the mean of its divisors is an integer number (512740656).

Almost surely, 2^22331333440 is an apocalyptic number.

22331333440 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 22331333440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28713476736).

22331333440 is an abundant number, since it is smaller than the sum of its proper divisors (35095620032).

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

22331333440 is a wasteful number, since it uses less digits than its factorization.

22331333440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15024 (or 15014 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 22331333440 its reverse (4433313322), we get a palindrome (26764646762).

The spelling of 22331333440 in words is "twenty-two billion, three hundred thirty-one million, three hundred thirty-three thousand, four hundred forty".