22317316644 has 96 divisors (see below), whose sum is σ = 63095880960. Its totient is φ = 5993459712.

The previous prime is 22317316643. The next prime is 22317316669. The reversal of 22317316644 is 44661371322.

It is a super-3 number, since 3×22317316644³ (a number of 32 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (22317316643) 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, 1128312 + ... + 1147920.

It is an arithmetic number, because the mean of its divisors is an integer number (657248760).

Almost surely, 2^22317316644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22317316644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31547940480).

22317316644 is an abundant number, since it is smaller than the sum of its proper divisors (40778564316).

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

22317316644 is a wasteful number, since it uses less digits than its factorization.

22317316644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20437 (or 20435 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

Adding to 22317316644 its reverse (44661371322), we get a palindrome (66978687966).

The spelling of 22317316644 in words is "twenty-two billion, three hundred seventeen million, three hundred sixteen thousand, six hundred forty-four".