21323384468 has 12 divisors (see below), whose sum is σ = 38226067572. Its totient is φ = 10401650880.

The previous prime is 21323384413. The next prime is 21323384471. The reversal of 21323384468 is 86448332312.

It can be written as a sum of positive squares in 2 ways, for example, as 4075290244 + 17248094224 = 63838^2 + 131332^2 .

It is a congruent number.

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, 65010155 + ... + 65010482.

It is an arithmetic number, because the mean of its divisors is an integer number (3185505631).

Almost surely, 2^21323384468 is an apocalyptic number.

It is an amenable number.

21323384468 is a deficient number, since it is larger than the sum of its proper divisors (16902683104).

21323384468 is a wasteful number, since it uses less digits than its factorization.

21323384468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130020682 (or 130020680 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The spelling of 21323384468 in words is "twenty-one billion, three hundred twenty-three million, three hundred eighty-four thousand, four hundred sixty-eight".