21335343 has 8 divisors (see below), whose sum is σ = 28469808. Its totient is φ = 14212224.

The previous prime is 21335339. The next prime is 21335351. The reversal of 21335343 is 34353312.

It is a happy number.

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

It is not a de Polignac number, because 21335343 - 2² = 21335339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335143) 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, 3721 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (3558726).

Almost surely, 2^21335343 is an apocalyptic number.

21335343 is a deficient number, since it is larger than the sum of its proper divisors (7134465).

21335343 is a wasteful number, since it uses less digits than its factorization.

21335343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5673.

The product of its digits is 3240, while the sum is 24.

The square root of 21335343 is about 4619.0197011920. The cubic root of 21335343 is about 277.3532183733.

Adding to 21335343 its reverse (34353312), we get a palindrome (55688655).

The spelling of 21335343 in words is "twenty-one million, three hundred thirty-five thousand, three hundred forty-three".