21200196 has 24 divisors (see below), whose sum is σ = 50520960. Its totient is φ = 6916192.

The previous prime is 21200191. The next prime is 21200209. The reversal of 21200196 is 69100212.

It is not an unprimeable number, because it can be changed into a prime (21200191) 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, 18231 + ... + 19358.

It is an arithmetic number, because the mean of its divisors is an integer number (2105040).

Almost surely, 2^21200196 is an apocalyptic number.

It is an amenable number.

21200196 is an abundant number, since it is smaller than the sum of its proper divisors (29320764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200196 is a wasteful number, since it uses less digits than its factorization.

21200196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37643 (or 37641 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21200196 is about 4604.3670574792. The cubic root of 21200196 is about 276.7663536514.

The spelling of 21200196 in words is "twenty-one million, two hundred thousand, one hundred ninety-six".