21513011524424 has 16 divisors (see below), whose sum is σ = 46099310409600. Its totient is φ = 9219862081872.

The previous prime is 21513011524393. The next prime is 21513011524441. The reversal of 21513011524424 is 42442511031512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192080459984 + ... + 192080460095.

It is an arithmetic number, because the mean of its divisors is an integer number (2881206900600).

Almost surely, 2^{21513011524424} is an apocalyptic number.

It is an amenable number.

21513011524424 is an abundant number, since it is smaller than the sum of its proper divisors (24586298885176).

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

21513011524424 is a wasteful number, since it uses less digits than its factorization.

21513011524424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384160920092 (or 384160920088 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 21513011524424 its reverse (42442511031512), we get a palindrome (63955522555936).

The spelling of 21513011524424 in words is "twenty-one trillion, five hundred thirteen billion, eleven million, five hundred twenty-four thousand, four hundred twenty-four".