20682317218 has 8 divisors (see below), whose sum is σ = 31330639260. Its totient is φ = 10238770800.

The previous prime is 20682317197. The next prime is 20682317231. The reversal of 20682317218 is 81271328602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19136018889 + 1546298329 = 138333^2 + 39323^2 .

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

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, 51193653 + ... + 51194056.

Almost surely, 2^20682317218 is an apocalyptic number.

20682317218 is a deficient number, since it is larger than the sum of its proper divisors (10648322042).

20682317218 is a wasteful number, since it uses less digits than its factorization.

20682317218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102387812.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 20682317218 in words is "twenty billion, six hundred eighty-two million, three hundred seventeen thousand, two hundred eighteen".