21334343 has 8 divisors (see below), whose sum is σ = 22134000. Its totient is φ = 20539008.

The previous prime is 21334333. The next prime is 21334373. The reversal of 21334343 is 34343312.

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 21334343 - 2¹⁸ = 21072199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334333) 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, 11708 + ... + 13406.

It is an arithmetic number, because the mean of its divisors is an integer number (2766750).

Almost surely, 2^21334343 is an apocalyptic number.

21334343 is a deficient number, since it is larger than the sum of its proper divisors (799657).

21334343 is a wasteful number, since it uses less digits than its factorization.

21334343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its digits is 2592, while the sum is 23.

The square root of 21334343 is about 4618.9114518466. The cubic root of 21334343 is about 277.3488850698.

Adding to 21334343 its reverse (34343312), we get a palindrome (55677655).

The spelling of 21334343 in words is "twenty-one million, three hundred thirty-four thousand, three hundred forty-three".