18120395901217 has 8 divisors (see below), whose sum is σ = 18753505948800. Its totient is φ = 17487837107664.

The previous prime is 18120395901193. The next prime is 18120395901319. The reversal of 18120395901217 is 71210959302181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18120395901217 - 2⁷ = 18120395901089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18120395904217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137746617 + ... + 137878102.

It is an arithmetic number, because the mean of its divisors is an integer number (2344188243600).

Almost surely, 2^{18120395901217} is an apocalyptic number.

It is an amenable number.

18120395901217 is a deficient number, since it is larger than the sum of its proper divisors (633110047583).

18120395901217 is a wasteful number, since it uses less digits than its factorization.

18120395901217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275627015.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 18120395901217 in words is "eighteen trillion, one hundred twenty billion, three hundred ninety-five million, nine hundred one thousand, two hundred seventeen".