18413813517 has 24 divisors (see below), whose sum is σ = 28574094528. Its totient is φ = 10503419520.

The previous prime is 18413813489. The next prime is 18413813527. The reversal of 18413813517 is 71531831481.

It is not a de Polignac number, because 18413813517 - 2²⁸ = 18145378061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413813527) 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 23 ways as a sum of consecutive naturals, for example, 1485793 + ... + 1498134.

It is an arithmetic number, because the mean of its divisors is an integer number (1190587272).

Almost surely, 2^18413813517 is an apocalyptic number.

18413813517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18413813517 is a deficient number, since it is larger than the sum of its proper divisors (10160281011).

18413813517 is a wasteful number, since it uses less digits than its factorization.

18413813517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983969 (or 2983958 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The spelling of 18413813517 in words is "eighteen billion, four hundred thirteen million, eight hundred thirteen thousand, five hundred seventeen".