16204018 has 4 divisors (see below), whose sum is σ = 24306030. Its totient is φ = 8102008.

The previous prime is 16204003. The next prime is 16204021. The reversal of 16204018 is 81040261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81040261 = 953 ⋅85037.

It can be written as a sum of positive squares in only one way, i.e., 15031129 + 1172889 = 3877^2 + 1083^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16204018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4051003 + ... + 4051006.

Almost surely, 2^16204018 is an apocalyptic number.

16204018 is a deficient number, since it is larger than the sum of its proper divisors (8102012).

16204018 is an equidigital number, since it uses as much as digits as its factorization.

16204018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102011.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 16204018 is about 4025.4214686167. The cubic root of 16204018 is about 253.0507170739.

Adding to 16204018 its reverse (81040261), we get a palindrome (97244279).

The spelling of 16204018 in words is "sixteen million, two hundred four thousand, eighteen".