18163636182 has 192 divisors, whose sum is σ = 43223229504. Its totient is φ = 5710694400.

The previous prime is 18163636177. The next prime is 18163636187. The reversal of 18163636182 is 28163636181.

18163636182 is a `hidden beast` number, since 1 + 8 + 1 + 6 + 3 + 636 + 1 + 8 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (18163636177) and next prime (18163636187).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18163636187) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 132581218 + ... + 132581354.

It is an arithmetic number, because the mean of its divisors is an integer number (225120987).

Almost surely, 2^18163636182 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18163636182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21611614752).

18163636182 is an abundant number, since it is smaller than the sum of its proper divisors (25059593322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18163636182 is a wasteful number, since it uses less digits than its factorization.

18163636182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 353 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

Subtracting 18163636182 from its reverse (28163636181), we obtain a palindrome (9999999999).

The spelling of 18163636182 in words is "eighteen billion, one hundred sixty-three million, six hundred thirty-six thousand, one hundred eighty-two".