22011444444 has 96 divisors (see below), whose sum is σ = 59466274560. Its totient is φ = 6318987840.

The previous prime is 22011444443. The next prime is 22011444449. The reversal of 22011444444 is 44444411022.

It is a super-2 number, since 2×22011444444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011444443) 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, 267202 + ... + 339734.

It is an arithmetic number, because the mean of its divisors is an integer number (619440360).

Almost surely, 2^22011444444 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 22011444444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29733137280).

22011444444 is an abundant number, since it is smaller than the sum of its proper divisors (37454830116).

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

22011444444 is a wasteful number, since it uses less digits than its factorization.

22011444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72592 (or 72568 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 22011444444 its reverse (44444411022), we get a palindrome (66455855466).

The spelling of 22011444444 in words is "twenty-two billion, eleven million, four hundred forty-four thousand, four hundred forty-four".