11201993818 has 32 divisors (see below), whose sum is σ = 18370022400. Its totient is φ = 5105239344.

The previous prime is 11201993749. The next prime is 11201993819. The reversal of 11201993818 is 81839910211.

It is not an unprimeable number, because it can be changed into a prime (11201993819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52221 + ... + 158527.

It is an arithmetic number, because the mean of its divisors is an integer number (574063200).

Almost surely, 2^11201993818 is an apocalyptic number.

11201993818 is a deficient number, since it is larger than the sum of its proper divisors (7168028582).

11201993818 is a wasteful number, since it uses less digits than its factorization.

11201993818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106434.

The product of its (nonzero) digits is 31104, while the sum is 43.

The spelling of 11201993818 in words is "eleven billion, two hundred one million, nine hundred ninety-three thousand, eight hundred eighteen".