18835184089 has 4 divisors (see below), whose sum is σ = 18835468240. Its totient is φ = 18834899940.

The previous prime is 18835184083. The next prime is 18835184111. The reversal of 18835184089 is 98048153881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98048153881 = 349 ⋅280940269.

It is a cyclic number.

It is not a de Polignac number, because 18835184089 - 2⁵ = 18835184057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18835184083) 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, 15922 + ... + 194740.

It is an arithmetic number, because the mean of its divisors is an integer number (4708867060).

Almost surely, 2^18835184089 is an apocalyptic number.

It is an amenable number.

18835184089 is a deficient number, since it is larger than the sum of its proper divisors (284151).

18835184089 is a wasteful number, since it uses less digits than its factorization.

18835184089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284150.

The product of its (nonzero) digits is 2211840, while the sum is 55.

The spelling of 18835184089 in words is "eighteen billion, eight hundred thirty-five million, one hundred eighty-four thousand, eighty-nine".