211381168818 has 32 divisors (see below), whose sum is σ = 423507268800. Its totient is φ = 70336342016.

The previous prime is 211381168813. The next prime is 211381168837. The reversal of 211381168818 is 818861183112.

It is a happy number.

211381168818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211381168813) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8644213 + ... + 8668631.

It is an arithmetic number, because the mean of its divisors is an integer number (13234602150).

Almost surely, 2^211381168818 is an apocalyptic number.

211381168818 is an abundant number, since it is smaller than the sum of its proper divisors (212126099982).

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

211381168818 is a wasteful number, since it uses less digits than its factorization.

211381168818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26906.

The product of its digits is 147456, while the sum is 48.

The spelling of 211381168818 in words is "two hundred eleven billion, three hundred eighty-one million, one hundred sixty-eight thousand, eight hundred eighteen".