21330682 has 16 divisors (see below), whose sum is σ = 34212672. Its totient is φ = 9938880.

The previous prime is 21330679. The next prime is 21330737. The reversal of 21330682 is 28603312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (2138292).

Almost surely, 2^21330682 is an apocalyptic number.

21330682 is a deficient number, since it is larger than the sum of its proper divisors (12881990).

21330682 is a wasteful number, since it uses less digits than its factorization.

21330682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 21330682 is about 4618.5151293462. The cubic root of 21330682 is about 277.3330196901. Note that the first 3 decimals are identical.

Adding to 21330682 its reverse (28603312), we get a palindrome (49933994).

The spelling of 21330682 in words is "twenty-one million, three hundred thirty thousand, six hundred eighty-two".