22400344320 has 144 divisors (see below), whose sum is σ = 73205385792. Its totient is φ = 5834465280.

The previous prime is 22400344319. The next prime is 22400344387. The reversal of 22400344320 is 2344300422.

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

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, 97290 + ... + 232950.

Almost surely, 2^22400344320 is an apocalyptic number.

22400344320 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 22400344320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36602692896).

22400344320 is an abundant number, since it is smaller than the sum of its proper divisors (50805041472).

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

22400344320 is a wasteful number, since it uses less digits than its factorization.

22400344320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135728 (or 135714 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 22400344320 its reverse (2344300422), we get a palindrome (24744644742).

The spelling of 22400344320 in words is "twenty-two billion, four hundred million, three hundred forty-four thousand, three hundred twenty".