22020032100 has 144 divisors (see below), whose sum is σ = 72525358080. Its totient is φ = 5106076800.

The previous prime is 22020032071. The next prime is 22020032107. The reversal of 22020032100 is 123002022.

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

It is not an unprimeable number, because it can be changed into a prime (22020032107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69160 + ... + 220959.

It is an arithmetic number, because the mean of its divisors is an integer number (503648320).

Almost surely, 2^22020032100 is an apocalyptic number.

22020032100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020032100 is an abundant number, since it is smaller than the sum of its proper divisors (50505325980).

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

22020032100 is a wasteful number, since it uses less digits than its factorization.

22020032100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290170 (or 290163 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 22020032100 its reverse (123002022), we get a palindrome (22143034122).

The spelling of 22020032100 in words is "twenty-two billion, twenty million, thirty-two thousand, one hundred".