16419218 has 4 divisors (see below), whose sum is σ = 24628830. Its totient is φ = 8209608.

The previous prime is 16419209. The next prime is 16419223. The reversal of 16419218 is 81291461.

16419218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 12229009 + 4190209 = 3497^2 + 2047^2 .

It is a super-4 number, since 4×16419218⁴ (a number of 30 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4104803 + ... + 4104806.

Almost surely, 2^16419218 is an apocalyptic number.

16419218 is a deficient number, since it is larger than the sum of its proper divisors (8209612).

16419218 is an equidigital number, since it uses as much as digits as its factorization.

16419218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8209611.

The product of its digits is 3456, while the sum is 32.

The square root of 16419218 is about 4052.0634249725. The cubic root of 16419218 is about 254.1660207932.

The spelling of 16419218 in words is "sixteen million, four hundred nineteen thousand, two hundred eighteen".