18518470848915 has 16 divisors (see below), whose sum is σ = 29842715616000. Its totient is φ = 9805463700192.

The previous prime is 18518470848907. The next prime is 18518470848929. The reversal of 18518470848915 is 51984807481581.

It is not a de Polignac number, because 18518470848915 - 2³ = 18518470848907 is a prime.

It is a super-2 number, since 2×18518470848915² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18518470848915.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4440878215 + ... + 4440882384.

It is an arithmetic number, because the mean of its divisors is an integer number (1865169726000).

Almost surely, 2^{18518470848915} is an apocalyptic number.

18518470848915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18518470848915 is a deficient number, since it is larger than the sum of its proper divisors (11324244767085).

18518470848915 is a wasteful number, since it uses less digits than its factorization.

18518470848915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8881760746.

The product of its (nonzero) digits is 103219200, while the sum is 69.

The spelling of 18518470848915 in words is "eighteen trillion, five hundred eighteen billion, four hundred seventy million, eight hundred forty-eight thousand, nine hundred fifteen".