22011220044 has 48 divisors (see below), whose sum is σ = 62253959040. Its totient is φ = 6670066320.

The previous prime is 22011220013. The next prime is 22011220051. The reversal of 22011220044 is 44002211022.

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

It is a junction number, because it is equal to n+sod(n) for n = 22011219999 and 22011220026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9262794 + ... + 9265169.

It is an arithmetic number, because the mean of its divisors is an integer number (1296957480).

Almost surely, 2^22011220044 is an apocalyptic number.

It is an amenable number.

22011220044 is an abundant number, since it is smaller than the sum of its proper divisors (40242738996).

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

22011220044 is a wasteful number, since it uses less digits than its factorization.

22011220044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18527987 (or 18527979 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22011220044 its reverse (44002211022), we get a palindrome (66013431066).

The spelling of 22011220044 in words is "twenty-two billion, eleven million, two hundred twenty thousand, forty-four".