16418 has 4 divisors (see below), whose sum is σ = 24630. Its totient is φ = 8208.

The previous prime is 16417. The next prime is 16421. The reversal of 16418 is 81461.

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., 16129 + 289 = 127^2 + 17^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16418.

It is not an unprimeable number, because it can be changed into a prime (16411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4103 + ... + 4106.

2¹⁶⁴¹⁸ is an apocalyptic number.

16418 is a deficient number, since it is larger than the sum of its proper divisors (8212).

16418 is an equidigital number, since it uses as much as digits as its factorization.

16418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211.

The product of its digits is 192, while the sum is 20.

The square root of 16418 is about 128.1327436684. The cubic root of 16418 is about 25.4159735844.

Adding to 16418 its reverse (81461), we get a palindrome (97879).

It can be divided in two parts, 16 and 418, that added together give a palindrome (434).

The spelling of 16418 in words is "sixteen thousand, four hundred eighteen".