18513598103 has 48 divisors (see below), whose sum is σ = 25179721728. Its totient is φ = 13245249600.

The previous prime is 18513598079. The next prime is 18513598139. The reversal of 18513598103 is 30189531581.

It is a happy number.

It is not a de Polignac number, because 18513598103 - 2¹⁴ = 18513581719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18513598193) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2098700 + ... + 2107502.

It is an arithmetic number, because the mean of its divisors is an integer number (524577536).

Almost surely, 2^18513598103 is an apocalyptic number.

18513598103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18513598103 is a deficient number, since it is larger than the sum of its proper divisors (6666123625).

18513598103 is a wasteful number, since it uses less digits than its factorization.

18513598103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036 (or 9025 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 44.

It can be divided in two parts, 18513 and 598103, that added together give a palindrome (616616).

The spelling of 18513598103 in words is "eighteen billion, five hundred thirteen million, five hundred ninety-eight thousand, one hundred three".