21844268 has 24 divisors (see below), whose sum is σ = 39245472. Its totient is φ = 10634624.

The previous prime is 21844261. The next prime is 21844271. The reversal of 21844268 is 86244812.

It is not an unprimeable number, because it can be changed into a prime (21844261) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35096 + ... + 35712.

It is an arithmetic number, because the mean of its divisors is an integer number (1635228).

Almost surely, 2^21844268 is an apocalyptic number.

It is an amenable number.

21844268 is a deficient number, since it is larger than the sum of its proper divisors (17401204).

21844268 is a wasteful number, since it uses less digits than its factorization.

21844268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 839 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 21844268 is about 4673.7851897579. The cubic root of 21844268 is about 279.5412044309.

The spelling of 21844268 in words is "twenty-one million, eight hundred forty-four thousand, two hundred sixty-eight".