18836864645473 has 16 divisors (see below), whose sum is σ = 22125922113024. Its totient is φ = 15701702552640.

The previous prime is 18836864645447. The next prime is 18836864645491. The reversal of 18836864645473 is 37454646863881.

It is a cyclic number.

It is not a de Polignac number, because 18836864645473 - 2²¹ = 18836862548321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18836864645396 and 18836864645405.

It is not an unprimeable number, because it can be changed into a prime (18836864645873) 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 in 15 ways as a sum of consecutive naturals, for example, 182288818 + ... + 182392123.

It is an arithmetic number, because the mean of its divisors is an integer number (1382870132064).

Almost surely, 2^{18836864645473} is an apocalyptic number.

It is an amenable number.

18836864645473 is a deficient number, since it is larger than the sum of its proper divisors (3289057467551).

18836864645473 is a wasteful number, since it uses less digits than its factorization.

18836864645473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364681152.

The product of its digits is 2229534720, while the sum is 73.

The spelling of 18836864645473 in words is "eighteen trillion, eight hundred thirty-six billion, eight hundred sixty-four million, six hundred forty-five thousand, four hundred seventy-three".