1836381818208 has 192 divisors, whose sum is σ = 5689483849728. Its totient is φ = 507521064960.

The previous prime is 1836381818191. The next prime is 1836381818261. The reversal of 1836381818208 is 8028181836381.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47831916 + ... + 47870292.

It is an arithmetic number, because the mean of its divisors is an integer number (29632728384).

Almost surely, 2^{1836381818208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1836381818208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2844741924864).

1836381818208 is an abundant number, since it is smaller than the sum of its proper divisors (3853102031520).

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

1836381818208 is a wasteful number, since it uses less digits than its factorization.

1836381818208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40725 (or 40717 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 57.

The spelling of 1836381818208 in words is "one trillion, eight hundred thirty-six billion, three hundred eighty-one million, eight hundred eighteen thousand, two hundred eight".