218334221986 has 16 divisors (see below), whose sum is σ = 329203784448. Its totient is φ = 108601059600.

The previous prime is 218334221983. The next prime is 218334222023. The reversal of 218334221986 is 689122433812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (218334221983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52530 + ... + 662893.

It is an arithmetic number, because the mean of its divisors is an integer number (20575236528).

Almost surely, 2^218334221986 is an apocalyptic number.

218334221986 is a deficient number, since it is larger than the sum of its proper divisors (110869562462).

218334221986 is a wasteful number, since it uses less digits than its factorization.

218334221986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716217.

The product of its digits is 995328, while the sum is 49.

The spelling of 218334221986 in words is "two hundred eighteen billion, three hundred thirty-four million, two hundred twenty-one thousand, nine hundred eighty-six".