21844196 has 12 divisors (see below), whose sum is σ = 41702640. Its totient is φ = 9929160.

The previous prime is 21844187. The next prime is 21844217. The reversal of 21844196 is 69144812.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 248186 + ... + 248273.

It is an arithmetic number, because the mean of its divisors is an integer number (3475220).

Almost surely, 2^21844196 is an apocalyptic number.

It is an amenable number.

21844196 is a deficient number, since it is larger than the sum of its proper divisors (19858444).

21844196 is a wasteful number, since it uses less digits than its factorization.

21844196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496474 (or 496472 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 21844196 is about 4673.7774872152. Note that the first 3 decimals coincide. The cubic root of 21844196 is about 279.5408973024.

The spelling of 21844196 in words is "twenty-one million, eight hundred forty-four thousand, one hundred ninety-six".