22001322132 has 72 divisors (see below), whose sum is σ = 56708531880. Its totient is φ = 7190277120.

The previous prime is 22001322121. The next prime is 22001322197. The reversal of 22001322132 is 23122310022.

It can be written as a sum of positive squares in 4 ways, for example, as 7907833476 + 14093488656 = 88926^2 + 118716^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 671344 + ... + 703352.

Almost surely, 2^22001322132 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 22001322132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28354265940).

22001322132 is an abundant number, since it is smaller than the sum of its proper divisors (34707209748).

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

22001322132 is a wasteful number, since it uses less digits than its factorization.

22001322132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32393 (or 32388 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22001322132 its reverse (23122310022), we get a palindrome (45123632154).

The spelling of 22001322132 in words is "twenty-two billion, one million, three hundred twenty-two thousand, one hundred thirty-two".