21342424313 has 8 divisors (see below), whose sum is σ = 24392226432. Its totient is φ = 18292843296.

The previous prime is 21342424289. The next prime is 21342424333. The reversal of 21342424313 is 31342424312.

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

It is not a de Polignac number, because 21342424313 - 2⁸ = 21342424057 is a prime.

It is a super-2 number, since 2×21342424313² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21342424333) 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, 340781 + ... + 398517.

It is an arithmetic number, because the mean of its divisors is an integer number (3049028304).

Almost surely, 2^21342424313 is an apocalyptic number.

It is an amenable number.

21342424313 is a deficient number, since it is larger than the sum of its proper divisors (3049802119).

21342424313 is an equidigital number, since it uses as much as digits as its factorization.

21342424313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110551.

The product of its digits is 13824, while the sum is 29.

Adding to 21342424313 its reverse (31342424312), we get a palindrome (52684848625).

Subtracting 21342424313 from its reverse (31342424312), we obtain a palindrome (9999999999).

The spelling of 21342424313 in words is "twenty-one billion, three hundred forty-two million, four hundred twenty-four thousand, three hundred thirteen".