21041424324 has 96 divisors (see below), whose sum is σ = 56516678400. Its totient is φ = 6761905920.

The previous prime is 21041424323. The next prime is 21041424367. The reversal of 21041424324 is 42342414012.

21041424324 is a `hidden beast` number, since 2 + 1 + 0 + 414 + 243 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21041424323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2272344 + ... + 2281584.

It is an arithmetic number, because the mean of its divisors is an integer number (588715400).

Almost surely, 2^21041424324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21041424324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28258339200).

21041424324 is an abundant number, since it is smaller than the sum of its proper divisors (35475254076).

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

21041424324 is a wasteful number, since it uses less digits than its factorization.

21041424324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010 (or 10002 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21041424324 its reverse (42342414012), we get a palindrome (63383838336).

The spelling of 21041424324 in words is "twenty-one billion, forty-one million, four hundred twenty-four thousand, three hundred twenty-four".