18448034549 has 12 divisors (see below), whose sum is σ = 21495001644. Its totient is φ = 15786779904.

The previous prime is 18448034453. The next prime is 18448034569. The reversal of 18448034549 is 94543084481.

It can be written as a sum of positive squares in 2 ways, for example, as 4619920900 + 13828113649 = 67970^2 + 117593^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18448034549 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18448034497 and 18448034506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448034569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277052 + ... + 337125.

It is an arithmetic number, because the mean of its divisors is an integer number (1791250137).

Almost surely, 2^18448034549 is an apocalyptic number.

It is an amenable number.

18448034549 is a deficient number, since it is larger than the sum of its proper divisors (3046967095).

18448034549 is an equidigital number, since it uses as much as digits as its factorization.

18448034549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614804 (or 614797 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 18448034549 in words is "eighteen billion, four hundred forty-eight million, thirty-four thousand, five hundred forty-nine".