21344141 has 16 divisors (see below), whose sum is σ = 26611200. Its totient is φ = 16668288.

The previous prime is 21344131. The next prime is 21344159. The reversal of 21344141 is 14144312.

It is not a de Polignac number, because 21344141 - 2⁶ = 21344077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5705 + ... + 8673.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^21344141 is an apocalyptic number.

It is an amenable number.

21344141 is a deficient number, since it is larger than the sum of its proper divisors (5267059).

21344141 is a wasteful number, since it uses less digits than its factorization.

21344141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068.

The product of its digits is 384, while the sum is 20.

The square root of 21344141 is about 4619.9719696119. The cubic root of 21344141 is about 277.3913369430.

Adding to 21344141 its reverse (14144312), we get a palindrome (35488453).

The spelling of 21344141 in words is "twenty-one million, three hundred forty-four thousand, one hundred forty-one".