18083987517 has 16 divisors (see below), whose sum is σ = 24773474880. Its totient is φ = 11729459712.

The previous prime is 18083987513. The next prime is 18083987531. The reversal of 18083987517 is 71578938081.

It is not a de Polignac number, because 18083987517 - 2² = 18083987513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18083987513) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 509478 + ... + 543815.

It is an arithmetic number, because the mean of its divisors is an integer number (1548342180).

Almost surely, 2^18083987517 is an apocalyptic number.

It is an amenable number.

18083987517 is a deficient number, since it is larger than the sum of its proper divisors (6689487363).

18083987517 is a wasteful number, since it uses less digits than its factorization.

18083987517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053452.

The product of its (nonzero) digits is 3386880, while the sum is 57.

The spelling of 18083987517 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, five hundred seventeen".