22011312020 has 24 divisors (see below), whose sum is σ = 48942800424. Its totient is φ = 8286611456.

The previous prime is 22011312017. The next prime is 22011312031. The reversal of 22011312020 is 2021311022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8405955856 + 13605356164 = 91684^2 + 116642^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22011311986 and 22011312004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32369237 + ... + 32369916.

It is an arithmetic number, because the mean of its divisors is an integer number (2039283351).

Almost surely, 2^22011312020 is an apocalyptic number.

22011312020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22011312020 is an abundant number, since it is smaller than the sum of its proper divisors (26931488404).

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

22011312020 is a wasteful number, since it uses less digits than its factorization.

22011312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64739179 (or 64739177 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22011312020 its reverse (2021311022), we get a palindrome (24032623042).

The spelling of 22011312020 in words is "twenty-two billion, eleven million, three hundred twelve thousand, twenty".