21330302 has 16 divisors (see below), whose sum is σ = 36684672. Its totient is φ = 9111960.

The previous prime is 21330299. The next prime is 21330311. The reversal of 21330302 is 20303312.

It is a super-2 number, since 2×21330302² = 909963566822408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 2333 + ... + 6935.

It is an arithmetic number, because the mean of its divisors is an integer number (2292792).

Almost surely, 2^21330302 is an apocalyptic number.

21330302 is a deficient number, since it is larger than the sum of its proper divisors (15354370).

21330302 is a wasteful number, since it uses less digits than its factorization.

21330302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 21330302 is about 4618.4739903999. The cubic root of 21330302 is about 277.3313728109.

Adding to 21330302 its reverse (20303312), we get a palindrome (41633614).

The spelling of 21330302 in words is "twenty-one million, three hundred thirty thousand, three hundred two".