18317013218 has 32 divisors (see below), whose sum is σ = 31677609600. Its totient is φ = 7781140224.

The previous prime is 18317013199. The next prime is 18317013223. The reversal of 18317013218 is 81231071381.

It is a happy number.

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, 911018 + ... + 930906.

It is an arithmetic number, because the mean of its divisors is an integer number (989925300).

Almost surely, 2^18317013218 is an apocalyptic number.

18317013218 is a deficient number, since it is larger than the sum of its proper divisors (13360596382).

18317013218 is a wasteful number, since it uses less digits than its factorization.

18317013218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20474.

The product of its (nonzero) digits is 8064, while the sum is 35.

Adding to 18317013218 its reverse (81231071381), we get a palindrome (99548084599).

The spelling of 18317013218 in words is "eighteen billion, three hundred seventeen million, thirteen thousand, two hundred eighteen".