18543848645 has 16 divisors (see below), whose sum is σ = 25542629760. Its totient is φ = 12660249024.

The previous prime is 18543848639. The next prime is 18543848717. The reversal of 18543848645 is 54684834581.

It is a cyclic number.

It is not a de Polignac number, because 18543848645 - 2¹⁴ = 18543832261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1148807 + ... + 1164836.

It is an arithmetic number, because the mean of its divisors is an integer number (1596414360).

Almost surely, 2^18543848645 is an apocalyptic number.

It is an amenable number.

18543848645 is a deficient number, since it is larger than the sum of its proper divisors (6998781115).

18543848645 is a wasteful number, since it uses less digits than its factorization.

18543848645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313884.

The product of its digits is 14745600, while the sum is 56.

The spelling of 18543848645 in words is "eighteen billion, five hundred forty-three million, eight hundred forty-eight thousand, six hundred forty-five".