11803218043 has 4 divisors (see below), whose sum is σ = 11913528600. Its totient is φ = 11692907488.

The previous prime is 11803218029. The next prime is 11803218061. The reversal of 11803218043 is 34081230811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34081230811 = 17 ⋅2004778283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11803218043 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11803217996 and 11803218014.

It is not an unprimeable number, because it can be changed into a prime (11803218143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55155118 + ... + 55155331.

It is an arithmetic number, because the mean of its divisors is an integer number (2978382150).

Almost surely, 2^11803218043 is an apocalyptic number.

11803218043 is a deficient number, since it is larger than the sum of its proper divisors (110310557).

11803218043 is a wasteful number, since it uses less digits than its factorization.

11803218043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110310556.

The product of its (nonzero) digits is 4608, while the sum is 31.

Adding to 11803218043 its reverse (34081230811), we get a palindrome (45884448854).

The spelling of 11803218043 in words is "eleven billion, eight hundred three million, two hundred eighteen thousand, forty-three".