18538888893 has 16 divisors (see below), whose sum is σ = 28906707456. Its totient is φ = 10347286320.

The previous prime is 18538888883. The next prime is 18538888897. The reversal of 18538888893 is 39888883581.

It is not a de Polignac number, because 18538888893 - 2¹⁷ = 18538757821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18538888897) 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, 10264263 + ... + 10266068.

It is an arithmetic number, because the mean of its divisors is an integer number (1806669216).

Almost surely, 2^18538888893 is an apocalyptic number.

It is an amenable number.

18538888893 is a deficient number, since it is larger than the sum of its proper divisors (10367818563).

18538888893 is a wasteful number, since it uses less digits than its factorization.

18538888893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20530384.

The product of its digits is 106168320, while the sum is 69.

The spelling of 18538888893 in words is "eighteen billion, five hundred thirty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-three".