21302324 has 12 divisors (see below), whose sum is σ = 38900064. Its totient is φ = 10188024.

The previous prime is 21302321. The next prime is 21302371. The reversal of 21302324 is 42320312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115682 + ... + 115865.

It is an arithmetic number, because the mean of its divisors is an integer number (3241672).

Almost surely, 2^21302324 is an apocalyptic number.

It is an amenable number.

21302324 is a deficient number, since it is larger than the sum of its proper divisors (17597740).

21302324 is a wasteful number, since it uses less digits than its factorization.

21302324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231574 (or 231572 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21302324 is about 4615.4440739760. Note that the first 3 decimals coincide. The cubic root of 21302324 is about 277.2100653851.

Adding to 21302324 its reverse (42320312), we get a palindrome (63622636).

The spelling of 21302324 in words is "twenty-one million, three hundred two thousand, three hundred twenty-four".