22006012 has 48 divisors (see below), whose sum is σ = 46710720. Its totient is φ = 8870400.

The previous prime is 22005989. The next prime is 22006037. The reversal of 22006012 is 21060022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22005983 and 22006001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32962 + ... + 33622.

It is an arithmetic number, because the mean of its divisors is an integer number (973140).

Almost surely, 2^22006012 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 22006012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23355360).

22006012 is an abundant number, since it is smaller than the sum of its proper divisors (24704708).

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

22006012 is a wasteful number, since it uses less digits than its factorization.

22006012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22006012 is about 4691.0565973989. The cubic root of 22006012 is about 280.2294547719.

Adding to 22006012 its reverse (21060022), we get a palindrome (43066034).

The spelling of 22006012 in words is "twenty-two million, six thousand, twelve".