18169116853 has 4 divisors (see below), whose sum is σ = 18197911648. Its totient is φ = 18140322060.

The previous prime is 18169116817. The next prime is 18169116857. The reversal of 18169116853 is 35861196181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35861196181 = 149 ⋅240679169.

It is a cyclic number.

It is not a de Polignac number, because 18169116853 - 2²¹ = 18167019701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18169116797 and 18169116806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18169116857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14396451 + ... + 14397712.

It is an arithmetic number, because the mean of its divisors is an integer number (4549477912).

Almost surely, 2^18169116853 is an apocalyptic number.

It is an amenable number.

18169116853 is a deficient number, since it is larger than the sum of its proper divisors (28794795).

18169116853 is an equidigital number, since it uses as much as digits as its factorization.

18169116853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28794794.

The product of its digits is 311040, while the sum is 49.

The spelling of 18169116853 in words is "eighteen billion, one hundred sixty-nine million, one hundred sixteen thousand, eight hundred fifty-three".