21234341 has 4 divisors (see below), whose sum is σ = 21444684. Its totient is φ = 21024000.

The previous prime is 21234307. The next prime is 21234347. The reversal of 21234341 is 14343212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18241441 + 2992900 = 4271^2 + 1730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234341 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105020 + ... + 105221.

It is an arithmetic number, because the mean of its divisors is an integer number (5361171).

Almost surely, 2^21234341 is an apocalyptic number.

It is an amenable number.

21234341 is a deficient number, since it is larger than the sum of its proper divisors (210343).

21234341 is a wasteful number, since it uses less digits than its factorization.

21234341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210342.

The product of its digits is 576, while the sum is 20.

The square root of 21234341 is about 4608.0734586159. The cubic root of 21234341 is about 276.9148604261.

Adding to 21234341 its reverse (14343212), we get a palindrome (35577553).

The spelling of 21234341 in words is "twenty-one million, two hundred thirty-four thousand, three hundred forty-one".