218218967338 has 8 divisors (see below), whose sum is σ = 327386330532. Its totient is φ = 109090190496.

The previous prime is 218218967327. The next prime is 218218967383. The reversal of 218218967338 is 833769812812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 157035460729 + 61183506609 = 396277^2 + 247353^2 .

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

It is a super-2 number, since 2×218218967338² (a number of 23 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, 9632445 + ... + 9655072.

Almost surely, 2^218218967338 is an apocalyptic number.

218218967338 is a deficient number, since it is larger than the sum of its proper divisors (109167363194).

218218967338 is a wasteful number, since it uses less digits than its factorization.

218218967338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19293176.

The product of its digits is 6967296, while the sum is 58.

The spelling of 218218967338 in words is "two hundred eighteen billion, two hundred eighteen million, nine hundred sixty-seven thousand, three hundred thirty-eight".