18141991182 has 288 divisors, whose sum is σ = 49305784320. Its totient is φ = 4797636480.

The previous prime is 18141991163. The next prime is 18141991199. The reversal of 18141991182 is 28119914181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 79920553 + ... + 79920779.

It is an arithmetic number, because the mean of its divisors is an integer number (171200640).

Almost surely, 2^18141991182 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18141991182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24652892160).

18141991182 is an abundant number, since it is smaller than the sum of its proper divisors (31163793138).

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

18141991182 is a wasteful number, since it uses less digits than its factorization.

18141991182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 386 counting only the distinct ones).

The product of its digits is 41472, while the sum is 45.

The spelling of 18141991182 in words is "eighteen billion, one hundred forty-one million, nine hundred ninety-one thousand, one hundred eighty-two".