21163341 has 4 divisors (see below), whose sum is σ = 28217792. Its totient is φ = 14108892.

The previous prime is 21163333. The next prime is 21163343. The reversal of 21163341 is 14336112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21163341 - 2³ = 21163333 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 (21163343) 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 3 ways as a sum of consecutive naturals, for example, 3527221 + ... + 3527226.

It is an arithmetic number, because the mean of its divisors is an integer number (7054448).

Almost surely, 2^21163341 is an apocalyptic number.

It is an amenable number.

21163341 is a deficient number, since it is larger than the sum of its proper divisors (7054451).

21163341 is an equidigital number, since it uses as much as digits as its factorization.

21163341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054450.

The product of its digits is 432, while the sum is 21.

The square root of 21163341 is about 4600.3631378403. The cubic root of 21163341 is about 276.6058812284.

Adding to 21163341 its reverse (14336112), we get a palindrome (35499453).

The spelling of 21163341 in words is "twenty-one million, one hundred sixty-three thousand, three hundred forty-one".