21344113 has 8 divisors (see below), whose sum is σ = 24451200. Its totient is φ = 18251520.

The previous prime is 21344093. The next prime is 21344117. The reversal of 21344113 is 31144312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21344113 - 2⁹ = 21343601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (3056400).

Almost surely, 2^21344113 is an apocalyptic number.

It is an amenable number.

21344113 is a deficient number, since it is larger than the sum of its proper divisors (3107087).

21344113 is an equidigital number, since it uses as much as digits as its factorization.

21344113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247.

The product of its digits is 288, while the sum is 19.

The square root of 21344113 is about 4619.9689392895. The cubic root of 21344113 is about 277.3912156457.

Adding to 21344113 its reverse (31144312), we get a palindrome (52488425).

The spelling of 21344113 in words is "twenty-one million, three hundred forty-four thousand, one hundred thirteen".