18209100011 has 4 divisors (see below), whose sum is σ = 18290755392. Its totient is φ = 18127444632.

The previous prime is 18209099989. The next prime is 18209100059. The reversal of 18209100011 is 11000190281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18209100011 - 2⁶ = 18209099947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18209100011.

It is not an unprimeable number, because it can be changed into a prime (18209100311) 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, 40827356 + ... + 40827801.

It is an arithmetic number, because the mean of its divisors is an integer number (4572688848).

Almost surely, 2^18209100011 is an apocalyptic number.

18209100011 is a deficient number, since it is larger than the sum of its proper divisors (81655381).

18209100011 is an equidigital number, since it uses as much as digits as its factorization.

18209100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81655380.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 18209100011 its reverse (11000190281), we get a palindrome (29209290292).

The spelling of 18209100011 in words is "eighteen billion, two hundred nine million, one hundred thousand, eleven".