218683387058 has 4 divisors (see below), whose sum is σ = 328025080590. Its totient is φ = 109341693528.

The previous prime is 218683387057. The next prime is 218683387093. The reversal of 218683387058 is 850783386812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 217671701809 + 1011685249 = 466553^2 + 31807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218683386988 and 218683387006.

It is not an unprimeable number, because it can be changed into a prime (218683387051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54670846763 + ... + 54670846766.

Almost surely, 2^218683387058 is an apocalyptic number.

218683387058 is a deficient number, since it is larger than the sum of its proper divisors (109341693532).

218683387058 is a wasteful number, since it uses less digits than its factorization.

218683387058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109341693531.

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 218683387058 in words is "two hundred eighteen billion, six hundred eighty-three million, three hundred eighty-seven thousand, fifty-eight".