18144334439 has 8 divisors (see below), whose sum is σ = 22621507968. Its totient is φ = 14138442360.

The previous prime is 18144334427. The next prime is 18144334457. The reversal of 18144334439 is 93443344181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18144334439 - 2¹² = 18144330343 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 18144334439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144334469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117820277 + ... + 117820430.

It is an arithmetic number, because the mean of its divisors is an integer number (2827688496).

Almost surely, 2^18144334439 is an apocalyptic number.

18144334439 is a deficient number, since it is larger than the sum of its proper divisors (4477173529).

18144334439 is a wasteful number, since it uses less digits than its factorization.

18144334439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235640725.

The product of its digits is 497664, while the sum is 44.

The spelling of 18144334439 in words is "eighteen billion, one hundred forty-four million, three hundred thirty-four thousand, four hundred thirty-nine".