21334199 has 4 divisors (see below), whose sum is σ = 21343440. Its totient is φ = 21324960.

The previous prime is 21334189. The next prime is 21334213. The reversal of 21334199 is 99143312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21334199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2159 + ... + 6879.

It is an arithmetic number, because the mean of its divisors is an integer number (5335860).

Almost surely, 2^21334199 is an apocalyptic number.

21334199 is a deficient number, since it is larger than the sum of its proper divisors (9241).

21334199 is an equidigital number, since it uses as much as digits as its factorization.

21334199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240.

The product of its digits is 5832, while the sum is 32.

The square root of 21334199 is about 4618.8958637319. The cubic root of 21334199 is about 277.3482610629.

The spelling of 21334199 in words is "twenty-one million, three hundred thirty-four thousand, one hundred ninety-nine".