21130324424 has 32 divisors (see below), whose sum is σ = 43227453600. Its totient is φ = 9603285120.

The previous prime is 21130324417. The next prime is 21130324429. The reversal of 21130324424 is 42442303112.

It is a super-2 number, since 2×21130324424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21130324393 and 21130324402.

It is not an unprimeable number, because it can be changed into a prime (21130324429) 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, 801647 + ... + 827585.

It is an arithmetic number, because the mean of its divisors is an integer number (1350857925).

Almost surely, 2^21130324424 is an apocalyptic number.

It is an amenable number.

21130324424 is an abundant number, since it is smaller than the sum of its proper divisors (22097129176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21130324424 is a wasteful number, since it uses less digits than its factorization.

21130324424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35213 (or 35209 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21130324424 its reverse (42442303112), we get a palindrome (63572627536).

The spelling of 21130324424 in words is "twenty-one billion, one hundred thirty million, three hundred twenty-four thousand, four hundred twenty-four".