18518383898 has 48 divisors (see below), whose sum is σ = 34880388480. Its totient is φ = 7329589344.

The previous prime is 18518383889. The next prime is 18518383907. The reversal of 18518383898 is 89838381581.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18518383889) and next prime (18518383907).

It is a self number, because there is not a number n which added to its sum of digits gives 18518383898.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76286 + ... + 207017.

It is an arithmetic number, because the mean of its divisors is an integer number (726674760).

Almost surely, 2^18518383898 is an apocalyptic number.

18518383898 is a deficient number, since it is larger than the sum of its proper divisors (16362004582).

18518383898 is a wasteful number, since it uses less digits than its factorization.

18518383898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283371 (or 283364 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 62.

The spelling of 18518383898 in words is "eighteen billion, five hundred eighteen million, three hundred eighty-three thousand, eight hundred ninety-eight".