21448343 has 8 divisors (see below), whose sum is σ = 24542112. Its totient is φ = 18362016.

The previous prime is 21448337. The next prime is 21448379. The reversal of 21448343 is 34384412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21448343 - 2⁴ = 21448327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21448333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7421 + ... + 9897.

It is an arithmetic number, because the mean of its divisors is an integer number (3067764).

Almost surely, 2^21448343 is an apocalyptic number.

21448343 is a deficient number, since it is larger than the sum of its proper divisors (3093769).

21448343 is a wasteful number, since it uses less digits than its factorization.

21448343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721.

The product of its digits is 9216, while the sum is 29.

The square root of 21448343 is about 4631.2355802744. The cubic root of 21448343 is about 277.8420120903.

The spelling of 21448343 in words is "twenty-one million, four hundred forty-eight thousand, three hundred forty-three".