12217585418 has 8 divisors (see below), whose sum is σ = 19123177248. Its totient is φ = 5843193004.

The previous prime is 12217585403. The next prime is 12217585427. The reversal of 12217585418 is 81458571221.

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

It is a super-2 number, since 2×12217585418² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132799796 + ... + 132799887.

It is an arithmetic number, because the mean of its divisors is an integer number (2390397156).

Almost surely, 2^12217585418 is an apocalyptic number.

12217585418 is a deficient number, since it is larger than the sum of its proper divisors (6905591830).

12217585418 is a wasteful number, since it uses less digits than its factorization.

12217585418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265599708.

The product of its digits is 179200, while the sum is 44.

The spelling of 12217585418 in words is "twelve billion, two hundred seventeen million, five hundred eighty-five thousand, four hundred eighteen".