21124333 has 8 divisors (see below), whose sum is σ = 22435200. Its totient is φ = 19833408.

The previous prime is 21124321. The next prime is 21124339. The reversal of 21124333 is 33342112.

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 21124333 - 2¹⁷ = 20993261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21124333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2773 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (2804400).

Almost surely, 2^21124333 is an apocalyptic number.

It is an amenable number.

21124333 is a deficient number, since it is larger than the sum of its proper divisors (1310867).

21124333 is a wasteful number, since it uses less digits than its factorization.

21124333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971.

The product of its digits is 432, while the sum is 19.

The square root of 21124333 is about 4596.1215171055. The cubic root of 21124333 is about 276.4358312310.

Adding to 21124333 its reverse (33342112), we get a palindrome (54466445).

The spelling of 21124333 in words is "twenty-one million, one hundred twenty-four thousand, three hundred thirty-three".