22201017720 has 256 divisors, whose sum is σ = 79626240000. Its totient is φ = 4841734656.

The previous prime is 22201017667. The next prime is 22201017721. The reversal of 22201017720 is 2771010222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201017721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9253081 + ... + 9255479.

It is an arithmetic number, because the mean of its divisors is an integer number (311040000).

Almost surely, 2^22201017720 is an apocalyptic number.

22201017720 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 22201017720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39813120000).

22201017720 is an abundant number, since it is smaller than the sum of its proper divisors (57425222280).

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

22201017720 is a wasteful number, since it uses less digits than its factorization.

22201017720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

Adding to 22201017720 its reverse (2771010222), we get a palindrome (24972027942).

The spelling of 22201017720 in words is "twenty-two billion, two hundred one million, seventeen thousand, seven hundred twenty".