22001306912 has 54 divisors (see below), whose sum is σ = 46926569403. Its totient is φ = 10149414912.

The previous prime is 22001306851. The next prime is 22001306981. The reversal of 22001306912 is 21960310022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 10808513296 + 11192793616 = 103964^2 + 105796^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104884.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10906928 + ... + 10908944.

Almost surely, 2^22001306912 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 22001306912

22001306912 is an abundant number, since it is smaller than the sum of its proper divisors (24925262491).

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

22001306912 is an frugal number, since it uses more digits than its factorization.

22001306912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070 (or 2032 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 22001306912 its reverse (21960310022), we get a palindrome (43961616934).

The spelling of 22001306912 in words is "twenty-two billion, one million, three hundred six thousand, nine hundred twelve".