21304137241 has 8 divisors (see below), whose sum is σ = 22188095424. Its totient is φ = 20436398640.

The previous prime is 21304137233. The next prime is 21304137247. The reversal of 21304137241 is 14273140312.

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

It is a cyclic number.

It is not a de Polignac number, because 21304137241 - 2³ = 21304137233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21304137247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4052215 + ... + 4057468.

It is an arithmetic number, because the mean of its divisors is an integer number (2773511928).

Almost surely, 2^21304137241 is an apocalyptic number.

It is an amenable number.

21304137241 is a deficient number, since it is larger than the sum of its proper divisors (883958183).

21304137241 is an equidigital number, since it uses as much as digits as its factorization.

21304137241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109791.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 21304137241 its reverse (14273140312), we get a palindrome (35577277553).

The spelling of 21304137241 in words is "twenty-one billion, three hundred four million, one hundred thirty-seven thousand, two hundred forty-one".