21244341 has 16 divisors (see below), whose sum is σ = 29767680. Its totient is φ = 13450800.

The previous prime is 21244309. The next prime is 21244367. The reversal of 21244341 is 14344212.

It is not a de Polignac number, because 21244341 - 2⁵ = 21244309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21246341) 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 15 ways as a sum of consecutive naturals, for example, 9400 + ... + 11438.

It is an arithmetic number, because the mean of its divisors is an integer number (1860480).

Almost surely, 2^21244341 is an apocalyptic number.

It is an amenable number.

21244341 is a deficient number, since it is larger than the sum of its proper divisors (8523339).

21244341 is a wasteful number, since it uses less digits than its factorization.

21244341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216.

The product of its digits is 768, while the sum is 21.

The square root of 21244341 is about 4609.1583830457. The cubic root of 21244341 is about 276.9583232618.

Adding to 21244341 its reverse (14344212), we get a palindrome (35588553).

The spelling of 21244341 in words is "twenty-one million, two hundred forty-four thousand, three hundred forty-one".