22505343820 has 96 divisors (see below), whose sum is σ = 50198400000. Its totient is φ = 8451641088.

The previous prime is 22505343803. The next prime is 22505343829. The reversal of 22505343820 is 2834350522.

It is not an unprimeable number, because it can be changed into a prime (22505343829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27147166 + ... + 27147994.

It is an arithmetic number, because the mean of its divisors is an integer number (522900000).

Almost surely, 2^22505343820 is an apocalyptic number.

22505343820 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 22505343820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25099200000).

22505343820 is an abundant number, since it is smaller than the sum of its proper divisors (27693056180).

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

22505343820 is a wasteful number, since it uses less digits than its factorization.

22505343820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 22505343820 in words is "twenty-two billion, five hundred five million, three hundred forty-three thousand, eight hundred twenty".