21334210 has 16 divisors (see below), whose sum is σ = 38587392. Its totient is φ = 8492400.

The previous prime is 21334189. The next prime is 21334213. The reversal of 21334210 is 1243312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21334213) 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, 2946 + ... + 7165.

It is an arithmetic number, because the mean of its divisors is an integer number (2411712).

Almost surely, 2^21334210 is an apocalyptic number.

21334210 is a deficient number, since it is larger than the sum of its proper divisors (17253182).

21334210 is a wasteful number, since it uses less digits than its factorization.

21334210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10329.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21334210 is about 4618.8970544926. The cubic root of 21334210 is about 277.3483087302.

Adding to 21334210 its reverse (1243312), we get a palindrome (22577522).

The spelling of 21334210 in words is "twenty-one million, three hundred thirty-four thousand, two hundred ten".