11866123803 has 16 divisors (see below), whose sum is σ = 15927038496. Its totient is φ = 7858060800.

The previous prime is 11866123799. The next prime is 11866123817. The reversal of 11866123803 is 30832166811.

11866123803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11866123803 - 2² = 11866123799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11866123823) 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 15 ways as a sum of consecutive naturals, for example, 613801 + ... + 632837.

It is an arithmetic number, because the mean of its divisors is an integer number (995439906).

Almost surely, 2^11866123803 is an apocalyptic number.

11866123803 is a deficient number, since it is larger than the sum of its proper divisors (4060914693).

11866123803 is a wasteful number, since it uses less digits than its factorization.

11866123803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 11866123803 in words is "eleven billion, eight hundred sixty-six million, one hundred twenty-three thousand, eight hundred three".