22243422720 has 160 divisors (see below), whose sum is σ = 71655503040. Its totient is φ = 5886033920.

The previous prime is 22243422703. The next prime is 22243422767. The reversal of 22243422720 is 2722434222.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×22243422720² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 995026 + ... + 1017134.

It is an arithmetic number, because the mean of its divisors is an integer number (447846894).

Almost surely, 2^22243422720 is an apocalyptic number.

22243422720 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 22243422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35827751520).

22243422720 is an abundant number, since it is smaller than the sum of its proper divisors (49412080320).

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

22243422720 is a wasteful number, since it uses less digits than its factorization.

22243422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22266 (or 22250 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 30.

Adding to 22243422720 its reverse (2722434222), we get a palindrome (24965856942).

The spelling of 22243422720 in words is "twenty-two billion, two hundred forty-three million, four hundred twenty-two thousand, seven hundred twenty".