21200204 has 36 divisors (see below), whose sum is σ = 39855816. Its totient is φ = 9860928.

The previous prime is 21200191. The next prime is 21200209. The reversal of 21200204 is 40200212.

It is not an unprimeable number, because it can be changed into a prime (21200209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90872 + ... + 91104.

It is an arithmetic number, because the mean of its divisors is an integer number (1107106).

Almost surely, 2^21200204 is an apocalyptic number.

It is an amenable number.

21200204 is a deficient number, since it is larger than the sum of its proper divisors (18655612).

21200204 is a wasteful number, since it uses less digits than its factorization.

21200204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 21200204 is about 4604.3679262196. The cubic root of 21200204 is about 276.7663884644.

Adding to 21200204 its reverse (40200212), we get a palindrome (61400416).

The spelling of 21200204 in words is "twenty-one million, two hundred thousand, two hundred four".