22011021606 has 16 divisors (see below), whose sum is σ = 50310906624. Its totient is φ = 6288863304.

The previous prime is 22011021569. The next prime is 22011021691. The reversal of 22011021606 is 60612011022.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262035930 + ... + 262036013.

It is an arithmetic number, because the mean of its divisors is an integer number (3144431664).

Almost surely, 2^22011021606 is an apocalyptic number.

22011021606 is an abundant number, since it is smaller than the sum of its proper divisors (28299885018).

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

22011021606 is a wasteful number, since it uses less digits than its factorization.

22011021606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524071955.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 22011021606 its reverse (60612011022), we get a palindrome (82623032628).

The spelling of 22011021606 in words is "twenty-two billion, eleven million, twenty-one thousand, six hundred six".