18110393899 has 4 divisors (see below), whose sum is σ = 19503501136. Its totient is φ = 16717286664.

The previous prime is 18110393891. The next prime is 18110393909. The reversal of 18110393899 is 99839301181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99839301181 = 1543 ⋅64704667.

It is not a de Polignac number, because 18110393899 - 2³ = 18110393891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18110393891) 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, 696553599 + ... + 696553624.

It is an arithmetic number, because the mean of its divisors is an integer number (4875875284).

Almost surely, 2^18110393899 is an apocalyptic number.

18110393899 is a deficient number, since it is larger than the sum of its proper divisors (1393107237).

18110393899 is a wasteful number, since it uses less digits than its factorization.

18110393899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393107236.

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 18110393899 in words is "eighteen billion, one hundred ten million, three hundred ninety-three thousand, eight hundred ninety-nine".