20221100 has 36 divisors (see below), whose sum is σ = 44075304. Its totient is φ = 8052480.

The previous prime is 20221099. The next prime is 20221127. The reversal of 20221100 is 112202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43067 + ... + 43533.

It is an arithmetic number, because the mean of its divisors is an integer number (1224314).

Almost surely, 2^20221100 is an apocalyptic number.

20221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221100 is an abundant number, since it is smaller than the sum of its proper divisors (23854204).

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

20221100 is a wasteful number, since it uses less digits than its factorization.

20221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20221100 is about 4496.7877423779. The cubic root of 20221100 is about 272.4383610549.

Adding to 20221100 its reverse (112202), we get a palindrome (20333302).

The spelling of 20221100 in words is "twenty million, two hundred twenty-one thousand, one hundred".