21604734444323 has 8 divisors (see below), whose sum is σ = 22876095987360. Its totient is φ = 20333427880320.

The previous prime is 21604734444211. The next prime is 21604734444383. The reversal of 21604734444323 is 32344443740612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21604734444323 - 2⁸ = 21604734444067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21604734444383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12934343 + ... + 14508848.

It is an arithmetic number, because the mean of its divisors is an integer number (2859511998420).

Almost surely, 2^{21604734444323} is an apocalyptic number.

21604734444323 is a deficient number, since it is larger than the sum of its proper divisors (1271361543037).

21604734444323 is a wasteful number, since it uses less digits than its factorization.

21604734444323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27489517.

The product of its (nonzero) digits is 4644864, while the sum is 47.

The spelling of 21604734444323 in words is "twenty-one trillion, six hundred four billion, seven hundred thirty-four million, four hundred forty-four thousand, three hundred twenty-three".