21200198 has 8 divisors (see below), whose sum is σ = 32576040. Its totient is φ = 10341520.

The previous prime is 21200191. The next prime is 21200209. The reversal of 21200198 is 89100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200191) 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 3 ways as a sum of consecutive naturals, for example, 129188 + ... + 129351.

It is an arithmetic number, because the mean of its divisors is an integer number (4072005).

Almost surely, 2^21200198 is an apocalyptic number.

21200198 is a deficient number, since it is larger than the sum of its proper divisors (11375842).

21200198 is a wasteful number, since it uses less digits than its factorization.

21200198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258582.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 21200198 is about 4604.3672746643. The cubic root of 21200198 is about 276.7663623547.

The spelling of 21200198 in words is "twenty-one million, two hundred thousand, one hundred ninety-eight".