22221319680 has 720 divisors, whose sum is σ = 92966393520. Its totient is φ = 5079158784.

The previous prime is 22221319649. The next prime is 22221319697. The reversal of 22221319680 is 8691312222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3174474237 + ... + 3174474243.

It is an arithmetic number, because the mean of its divisors is an integer number (129119991).

Almost surely, 2^22221319680 is an apocalyptic number.

22221319680 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 22221319680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46483196760).

22221319680 is an abundant number, since it is smaller than the sum of its proper divisors (70745073840).

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

22221319680 is an frugal number, since it uses more digits than its factorization.

22221319680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 22221319680 in words is "twenty-two billion, two hundred twenty-one million, three hundred nineteen thousand, six hundred eighty".