21341323 has 4 divisors (see below), whose sum is σ = 21437248. Its totient is φ = 21245400.

The previous prime is 21341317. The next prime is 21341339. The reversal of 21341323 is 32314312.

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

It is a cyclic number.

It is not a de Polignac number, because 21341323 - 2⁹ = 21340811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21341323.

It is not an unprimeable number, because it can be changed into a prime (21341363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47628 + ... + 48073.

It is an arithmetic number, because the mean of its divisors is an integer number (5359312).

Almost surely, 2^21341323 is an apocalyptic number.

21341323 is a deficient number, since it is larger than the sum of its proper divisors (95925).

21341323 is an equidigital number, since it uses as much as digits as its factorization.

21341323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95924.

The product of its digits is 432, while the sum is 19.

The square root of 21341323 is about 4619.6669793395. Note that the first 3 decimals coincide. The cubic root of 21341323 is about 277.3791287030.

Adding to 21341323 its reverse (32314312), we get a palindrome (53655635).

It can be divided in two parts, 2134 and 1323, that multiplied together give a palindrome (2823282).

The spelling of 21341323 in words is "twenty-one million, three hundred forty-one thousand, three hundred twenty-three".