2181836382 has 16 divisors (see below), whose sum is σ = 4760370432. Its totient is φ = 661162520.

The previous prime is 2181836369. The next prime is 2181836407. The reversal of 2181836382 is 2836381812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16528998 + ... + 16529129.

It is an arithmetic number, because the mean of its divisors is an integer number (297523152).

Almost surely, 2^2181836382 is an apocalyptic number.

2181836382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2181836382 is an abundant number, since it is smaller than the sum of its proper divisors (2578534050).

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

2181836382 is a wasteful number, since it uses less digits than its factorization.

2181836382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33058143.

The product of its digits is 110592, while the sum is 42.

The square root of 2181836382 is about 46710.1314705921. The cubic root of 2181836382 is about 1297.0022408988.

The spelling of 2181836382 in words is "two billion, one hundred eighty-one million, eight hundred thirty-six thousand, three hundred eighty-two".