21395327 has 4 divisors (see below), whose sum is σ = 21420336. Its totient is φ = 21370320.

The previous prime is 21395321. The next prime is 21395329. The reversal of 21395327 is 72359312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21395327 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21395293 and 21395302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21395321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11174 + ... + 12947.

It is an arithmetic number, because the mean of its divisors is an integer number (5355084).

Almost surely, 2^21395327 is an apocalyptic number.

21395327 is a deficient number, since it is larger than the sum of its proper divisors (25009).

21395327 is an equidigital number, since it uses as much as digits as its factorization.

21395327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25008.

The product of its digits is 11340, while the sum is 32.

The square root of 21395327 is about 4625.5082963929. The cubic root of 21395327 is about 277.6128999797.

The spelling of 21395327 in words is "twenty-one million, three hundred ninety-five thousand, three hundred twenty-seven".