21838195 has 8 divisors (see below), whose sum is σ = 26815536. Its totient is φ = 17064096.

The previous prime is 21838171. The next prime is 21838231. The reversal of 21838195 is 59183812.

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 21838195 - 2¹¹ = 21836147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50572 + ... + 51001.

It is an arithmetic number, because the mean of its divisors is an integer number (3351942).

Almost surely, 2^21838195 is an apocalyptic number.

21838195 is a deficient number, since it is larger than the sum of its proper divisors (4977341).

21838195 is a wasteful number, since it uses less digits than its factorization.

21838195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101621.

The product of its digits is 17280, while the sum is 37.

The square root of 21838195 is about 4673.1354570566. The cubic root of 21838195 is about 279.5152966262.

The spelling of 21838195 in words is "twenty-one million, eight hundred thirty-eight thousand, one hundred ninety-five".