18044243017 has 4 divisors (see below), whose sum is σ = 18053589456. Its totient is φ = 18034896580.

The previous prime is 18044242963. The next prime is 18044243023. The reversal of 18044243017 is 71034244081.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 71034244081 = 71 ⋅1000482311.

It is a cyclic number.

It is not a de Polignac number, because 18044243017 - 2³¹ = 15896759369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18044243317) 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, 4670323 + ... + 4674184.

It is an arithmetic number, because the mean of its divisors is an integer number (4513397364).

Almost surely, 2^18044243017 is an apocalyptic number.

It is an amenable number.

18044243017 is a deficient number, since it is larger than the sum of its proper divisors (9346439).

18044243017 is an equidigital number, since it uses as much as digits as its factorization.

18044243017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9346438.

The product of its (nonzero) digits is 21504, while the sum is 34.

Adding to 18044243017 its reverse (71034244081), we get a palindrome (89078487098).

The spelling of 18044243017 in words is "eighteen billion, forty-four million, two hundred forty-three thousand, seventeen".