22011220020 has 48 divisors (see below), whose sum is σ = 61665383808. Its totient is φ = 5866423680.

The previous prime is 22011220013. The next prime is 22011220051. The reversal of 22011220020 is 2002211022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22011219978 and 22011220005.

It is a congruent number.

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, 9682 + ... + 210038.

It is an arithmetic number, because the mean of its divisors is an integer number (1284695496).

Almost surely, 2^22011220020 is an apocalyptic number.

22011220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22011220020 is an abundant number, since it is smaller than the sum of its proper divisors (39654163788).

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

22011220020 is a wasteful number, since it uses less digits than its factorization.

22011220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202200 (or 202198 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22011220020 its reverse (2002211022), we get a palindrome (24013431042).

It can be divided in two parts, 2201 and 1220020, that added together give a palindrome (1222221).

The spelling of 22011220020 in words is "twenty-two billion, eleven million, two hundred twenty thousand, twenty".