18144334208 has 512 divisors, whose sum is σ = 52115374080. Its totient is φ = 6062284800.

The previous prime is 18144334123. The next prime is 18144334267. The reversal of 18144334208 is 80243344181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138506303 + ... + 138506433.

It is an arithmetic number, because the mean of its divisors is an integer number (101787840).

Almost surely, 2^18144334208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18144334208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26057687040).

18144334208 is an abundant number, since it is smaller than the sum of its proper divisors (33971039872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18144334208 is a wasteful number, since it uses less digits than its factorization.

18144334208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

Adding to 18144334208 its reverse (80243344181), we get a palindrome (98387678389).

The spelling of 18144334208 in words is "eighteen billion, one hundred forty-four million, three hundred thirty-four thousand, two hundred eight".