21343304124 has 144 divisors (see below), whose sum is σ = 57656551680. Its totient is φ = 6638008320.

The previous prime is 21343304123. The next prime is 21343304141. The reversal of 21343304124 is 42140334312.

21343304124 is a `hidden beast` number, since 2 + 1 + 343 + 304 + 12 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343304123) 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 47 ways as a sum of consecutive naturals, for example, 14124529 + ... + 14126039.

It is an arithmetic number, because the mean of its divisors is an integer number (400392720).

Almost surely, 2^21343304124 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 21343304124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28828275840).

21343304124 is an abundant number, since it is smaller than the sum of its proper divisors (36313247556).

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

21343304124 is a wasteful number, since it uses less digits than its factorization.

21343304124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21343304124 its reverse (42140334312), we get a palindrome (63483638436).

The spelling of 21343304124 in words is "twenty-one billion, three hundred forty-three million, three hundred four thousand, one hundred twenty-four".