218059418 has 4 divisors (see below), whose sum is σ = 327089130. Its totient is φ = 109029708.

The previous prime is 218059417. The next prime is 218059423. The reversal of 218059418 is 814950812.

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., 190633249 + 27426169 = 13807^2 + 5237^2 .

It is not an unprimeable number, because it can be changed into a prime (218059417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54514853 + ... + 54514856.

Almost surely, 2^218059418 is an apocalyptic number.

218059418 is a deficient number, since it is larger than the sum of its proper divisors (109029712).

218059418 is a wasteful number, since it uses less digits than its factorization.

218059418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109029711.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 218059418 is about 14766.8350705221. The cubic root of 218059418 is about 601.9008401702.

The spelling of 218059418 in words is "two hundred eighteen million, fifty-nine thousand, four hundred eighteen".