18072517944 has 48 divisors (see below), whose sum is σ = 48924135000. Its totient is φ = 5560773504.

The previous prime is 18072517937. The next prime is 18072517963. The reversal of 18072517944 is 44971527081.

It is a junction number, because it is equal to n+sod(n) for n = 18072517893 and 18072517902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2223819 + ... + 2231930.

Almost surely, 2^18072517944 is an apocalyptic number.

It is an amenable number.

18072517944 is an abundant number, since it is smaller than the sum of its proper divisors (30851617056).

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

18072517944 is a wasteful number, since it uses less digits than its factorization.

18072517944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455784 (or 4455767 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 18072517944 in words is "eighteen billion, seventy-two million, five hundred seventeen thousand, nine hundred forty-four".