18319254217 has 8 divisors (see below), whose sum is σ = 20060631360. Its totient is φ = 16590542160.

The previous prime is 18319254203. The next prime is 18319254221. The reversal of 18319254217 is 71245291381.

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 18319254217 - 2⁷ = 18319254089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18319254287) 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, 3163242 + ... + 3169027.

It is an arithmetic number, because the mean of its divisors is an integer number (2507578920).

Almost surely, 2^18319254217 is an apocalyptic number.

It is an amenable number.

18319254217 is a deficient number, since it is larger than the sum of its proper divisors (1741377143).

18319254217 is a wasteful number, since it uses less digits than its factorization.

18319254217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332543.

The product of its digits is 120960, while the sum is 43.

The spelling of 18319254217 in words is "eighteen billion, three hundred nineteen million, two hundred fifty-four thousand, two hundred seventeen".