17921094723344 has 10 divisors (see below), whose sum is σ = 34722121026510. Its totient is φ = 8960547361664.

The previous prime is 17921094723253. The next prime is 17921094723349. The reversal of 17921094723344 is 44332749012971.

It can be written as a sum of positive squares in only one way, i.e., 16485938642944 + 1435156080400 = 4060288^2 + 1197980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 17921094723344.

It is not an unprimeable number, because it can be changed into a prime (17921094723349) 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 as a sum of consecutive naturals, namely, 560034210089 + ... + 560034210120.

It is an arithmetic number, because the mean of its divisors is an integer number (3472212102651).

Almost surely, 2^{17921094723344} is an apocalyptic number.

It is an amenable number.

17921094723344 is a deficient number, since it is larger than the sum of its proper divisors (16801026303166).

17921094723344 is a wasteful number, since it uses less digits than its factorization.

17921094723344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120068420217 (or 1120068420211 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 17921094723344 in words is "seventeen trillion, nine hundred twenty-one billion, ninety-four million, seven hundred twenty-three thousand, three hundred forty-four".