21313413424 has 20 divisors (see below), whose sum is σ = 41300928000. Its totient is φ = 10655109440.

The previous prime is 21313413421. The next prime is 21313413547. The reversal of 21313413424 is 42431431312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21313413392 and 21313413401.

It is not an unprimeable number, because it can be changed into a prime (21313413421) 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, 14202 + ... + 206950.

It is an arithmetic number, because the mean of its divisors is an integer number (2065046400).

Almost surely, 2^21313413424 is an apocalyptic number.

It is an amenable number.

21313413424 is a deficient number, since it is larger than the sum of its proper divisors (19987514576).

21313413424 is a wasteful number, since it uses less digits than its factorization.

21313413424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199668 (or 199662 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 21313413424 its reverse (42431431312), we get a palindrome (63744844736).

The spelling of 21313413424 in words is "twenty-one billion, three hundred thirteen million, four hundred thirteen thousand, four hundred twenty-four".