11903871893 has 4 divisors (see below), whose sum is σ = 11931363948. Its totient is φ = 11876379840.

The previous prime is 11903871883. The next prime is 11903871911. The reversal of 11903871893 is 39817830911.

11903871893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39817830911 = 929 ⋅42860959.

It can be written as a sum of positive squares in 2 ways, for example, as 2726615089 + 9177256804 = 52217^2 + 95798^2 .

It is a cyclic number.

It is not a de Polignac number, because 11903871893 - 2¹² = 11903867797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11903871803) 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 in 3 ways as a sum of consecutive naturals, for example, 13745378 + ... + 13746243.

It is an arithmetic number, because the mean of its divisors is an integer number (2982840987).

Almost surely, 2^11903871893 is an apocalyptic number.

It is an amenable number.

11903871893 is a deficient number, since it is larger than the sum of its proper divisors (27492055).

11903871893 is an equidigital number, since it uses as much as digits as its factorization.

11903871893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27492054.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 11903871893 in words is "eleven billion, nine hundred three million, eight hundred seventy-one thousand, eight hundred ninety-three".