19218336718 has 8 divisors (see below), whose sum is σ = 32945720112. Its totient is φ = 8236430016.

The previous prime is 19218336713. The next prime is 19218336719. The reversal of 19218336718 is 81763381291.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19218336713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686369155 + ... + 686369182.

It is an arithmetic number, because the mean of its divisors is an integer number (4118215014).

Almost surely, 2^19218336718 is an apocalyptic number.

19218336718 is a deficient number, since it is larger than the sum of its proper divisors (13727383394).

19218336718 is a wasteful number, since it uses less digits than its factorization.

19218336718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372738346.

The product of its digits is 435456, while the sum is 49.

The spelling of 19218336718 in words is "nineteen billion, two hundred eighteen million, three hundred thirty-six thousand, seven hundred eighteen".