22100002020 has 72 divisors (see below), whose sum is σ = 67049269560. Its totient is φ = 5892226560.

The previous prime is 22100001997. The next prime is 22100002051. The reversal of 22100002020 is 2020000122.

It can be written as a sum of positive squares in 4 ways, for example, as 3649126464 + 18450875556 = 60408^2 + 135834^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22100001993 and 22100002011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1491850 + ... + 1506590.

It is an arithmetic number, because the mean of its divisors is an integer number (931239855).

Almost surely, 2^22100002020 is an apocalyptic number.

22100002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22100002020 is an abundant number, since it is smaller than the sum of its proper divisors (44949267540).

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

22100002020 is a wasteful number, since it uses less digits than its factorization.

22100002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23085 (or 23080 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 22100002020 its reverse (2020000122), we get a palindrome (24120002142).

The spelling of 22100002020 in words is "twenty-two billion, one hundred million, two thousand, twenty".