21849344 has 36 divisors (see below), whose sum is σ = 47584320. Its totient is φ = 9930240.

The previous prime is 21849343. The next prime is 21849353. The reversal of 21849344 is 44394812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21849343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064 + ... + 6695.

Almost surely, 2^21849344 is an apocalyptic number.

It is an amenable number.

21849344 is an abundant number, since it is smaller than the sum of its proper divisors (25734976).

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

21849344 is an equidigital number, since it uses as much as digits as its factorization.

21849344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7786 (or 7772 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 21849344 is about 4674.3281870232. The cubic root of 21849344 is about 279.5628552862.

The spelling of 21849344 in words is "twenty-one million, eight hundred forty-nine thousand, three hundred forty-four".