11918909939 has 2 divisors, whose sum is σ = 11918909940. Its totient is φ = 11918909938.

The previous prime is 11918909917. The next prime is 11918909953. The reversal of 11918909939 is 93990981911.

11918909939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (93990981911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11918909939 - 2⁸ = 11918909683 is a prime.

It is not a weakly prime, because it can be changed into another prime (11918909999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5959454969 + 5959454970.

It is an arithmetic number, because the mean of its divisors is an integer number (5959454970).

Almost surely, 2^11918909939 is an apocalyptic number.

11918909939 is a deficient number, since it is larger than the sum of its proper divisors (1).

11918909939 is an equidigital number, since it uses as much as digits as its factorization.

11918909939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417176, while the sum is 59.

The spelling of 11918909939 in words is "eleven billion, nine hundred eighteen million, nine hundred nine thousand, nine hundred thirty-nine".