21200195 has 8 divisors (see below), whose sum is σ = 25533744. Its totient is φ = 16897824.

The previous prime is 21200191. The next prime is 21200209. The reversal of 21200195 is 59100212.

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

It is a cyclic number.

It is not a de Polignac number, because 21200195 - 2² = 21200191 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 6269 + ... + 9038.

It is an arithmetic number, because the mean of its divisors is an integer number (3191718).

Almost surely, 2^21200195 is an apocalyptic number.

21200195 is a deficient number, since it is larger than the sum of its proper divisors (4333549).

21200195 is a wasteful number, since it uses less digits than its factorization.

21200195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15589.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 21200195 is about 4604.3669488867. The cubic root of 21200195 is about 276.7663492998.

The spelling of 21200195 in words is "twenty-one million, two hundred thousand, one hundred ninety-five".