1836381820212 has 72 divisors (see below), whose sum is σ = 4886495359200. Its totient is φ = 579884384448.

The previous prime is 1836381820211. The next prime is 1836381820241. The reversal of 1836381820212 is 2120281836381.

1836381820212 is a `hidden beast` number, since 1 + 8 + 3 + 638 + 1 + 8 + 2 + 0 + 2 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1836381820211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20713114 + ... + 20801582.

It is an arithmetic number, because the mean of its divisors is an integer number (67867991100).

Almost surely, 2^{1836381820212} is an apocalyptic number.

1836381820212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1836381820212 is an abundant number, since it is smaller than the sum of its proper divisors (3050113538988).

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

1836381820212 is a wasteful number, since it uses less digits than its factorization.

1836381820212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118845 (or 118840 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 1836381820212 in words is "one trillion, eight hundred thirty-six billion, three hundred eighty-one million, eight hundred twenty thousand, two hundred twelve".