16220418 has 8 divisors (see below), whose sum is σ = 32440848. Its totient is φ = 5406804.

The previous prime is 16220411. The next prime is 16220419. The reversal of 16220418 is 81402261.

It is a sphenic number, since it is the product of 3 distinct primes.

16220418 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16220411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351696 + ... + 1351707.

It is an arithmetic number, because the mean of its divisors is an integer number (4055106).

Almost surely, 2^16220418 is an apocalyptic number.

16220418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16220418 is a wasteful number, since it uses less digits than its factorization.

16220418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703408.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 16220418 is about 4027.4580072299. The cubic root of 16220418 is about 253.1360587151.

Adding to 16220418 its reverse (81402261), we get a palindrome (97622679).

The spelling of 16220418 in words is "sixteen million, two hundred twenty thousand, four hundred eighteen".