18906708384353 has 4 divisors (see below), whose sum is σ = 18917493730308. Its totient is φ = 18895923038400.

The previous prime is 18906708384211. The next prime is 18906708384401. The reversal of 18906708384353 is 35348380760981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2974221015649 + 15932487368704 = 1724593^2 + 3991552^2 .

It is a cyclic number.

It is not a de Polignac number, because 18906708384353 - 2¹⁴ = 18906708367969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18906708384353.

It is not an unprimeable number, because it can be changed into a prime (18906708384653) 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 3 ways as a sum of consecutive naturals, for example, 5392670348 + ... + 5392673853.

It is an arithmetic number, because the mean of its divisors is an integer number (4729373432577).

Almost surely, 2^{18906708384353} is an apocalyptic number.

It is an amenable number.

18906708384353 is a deficient number, since it is larger than the sum of its proper divisors (10785345955).

18906708384353 is a wasteful number, since it uses less digits than its factorization.

18906708384353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10785345954.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 18906708384353 in words is "eighteen trillion, nine hundred six billion, seven hundred eight million, three hundred eighty-four thousand, three hundred fifty-three".