22208446720 has 144 divisors (see below), whose sum is σ = 55658937600. Its totient is φ = 8474222592.

The previous prime is 22208446679. The next prime is 22208446727. The reversal of 22208446720 is 2764480222.

It is a self number, because there is not a number n which added to its sum of digits gives 22208446720.

It is not an unprimeable number, because it can be changed into a prime (22208446727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14336506 + ... + 14338054.

It is an arithmetic number, because the mean of its divisors is an integer number (386520400).

Almost surely, 2^22208446720 is an apocalyptic number.

22208446720 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 22208446720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27829468800).

22208446720 is an abundant number, since it is smaller than the sum of its proper divisors (33450490880).

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

22208446720 is a wasteful number, since it uses less digits than its factorization.

22208446720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080 (or 2066 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 37.

The spelling of 22208446720 in words is "twenty-two billion, two hundred eight million, four hundred forty-six thousand, seven hundred twenty".