11918381829091 has 2 divisors, whose sum is σ = 11918381829092. Its totient is φ = 11918381829090.

The previous prime is 11918381829089. The next prime is 11918381829131. The reversal of 11918381829091 is 19092818381911.

It is a weak prime.

It is an emirp because it is prime and its reverse (19092818381911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11918381829091 - 2¹ = 11918381829089 is a prime.

Together with 11918381829089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11918381829041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5959190914545 + 5959190914546.

It is an arithmetic number, because the mean of its divisors is an integer number (5959190914546).

Almost surely, 2^{11918381829091} is an apocalyptic number.

11918381829091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11918381829091 is an equidigital number, since it uses as much as digits as its factorization.

11918381829091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 61.

The spelling of 11918381829091 in words is "eleven trillion, nine hundred eighteen billion, three hundred eighty-one million, eight hundred twenty-nine thousand, ninety-one".