21133324 has 12 divisors (see below), whose sum is σ = 37030000. Its totient is φ = 10553328.

The previous prime is 21133309. The next prime is 21133381. The reversal of 21133324 is 42333112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802 + ... + 6550.

Almost surely, 2^21133324 is an apocalyptic number.

It is an amenable number.

21133324 is a deficient number, since it is larger than the sum of its proper divisors (15896676).

21133324 is a wasteful number, since it uses less digits than its factorization.

21133324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6672 (or 6670 counting only the distinct ones).

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

The square root of 21133324 is about 4597.0995203498. The cubic root of 21133324 is about 276.4750448087.

Adding to 21133324 its reverse (42333112), we get a palindrome (63466436).

The spelling of 21133324 in words is "twenty-one million, one hundred thirty-three thousand, three hundred twenty-four".