11903817811 has 2 divisors, whose sum is σ = 11903817812. Its totient is φ = 11903817810.

The previous prime is 11903817763. The next prime is 11903817931. The reversal of 11903817811 is 11871830911.

It is a weak prime.

It is an emirp because it is prime and its reverse (11871830911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11903817811 - 2⁷ = 11903817683 is a prime.

It is not a weakly prime, because it can be changed into another prime (11903517811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5951908905 + 5951908906.

It is an arithmetic number, because the mean of its divisors is an integer number (5951908906).

Almost surely, 2^11903817811 is an apocalyptic number.

11903817811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11903817811 is an equidigital number, since it uses as much as digits as its factorization.

11903817811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 40.

The spelling of 11903817811 in words is "eleven billion, nine hundred three million, eight hundred seventeen thousand, eight hundred eleven".