16218838 has 4 divisors (see below), whose sum is σ = 24328260. Its totient is φ = 8109418.

The previous prime is 16218827. The next prime is 16218847. The reversal of 16218838 is 83881261.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 16218797 and 16218806.

It is a congruent number.

It is an unprimeable number.

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, 4054708 + ... + 4054711.

It is an arithmetic number, because the mean of its divisors is an integer number (6082065).

Almost surely, 2^16218838 is an apocalyptic number.

16218838 is a deficient number, since it is larger than the sum of its proper divisors (8109422).

16218838 is an equidigital number, since it uses as much as digits as its factorization.

16218838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109421.

The product of its digits is 18432, while the sum is 37.

The square root of 16218838 is about 4027.2618489490. The cubic root of 16218838 is about 253.1278392813.

The spelling of 16218838 in words is "sixteen million, two hundred eighteen thousand, eight hundred thirty-eight".