11621218 has 16 divisors (see below), whose sum is σ = 20565504. Its totient is φ = 4819680.

The previous prime is 11621213. The next prime is 11621237. The reversal of 11621218 is 81212611.

It is not an unprimeable number, because it can be changed into a prime (11621213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12955 + ... + 13822.

It is an arithmetic number, because the mean of its divisors is an integer number (1285344).

Almost surely, 2^11621218 is an apocalyptic number.

11621218 is a deficient number, since it is larger than the sum of its proper divisors (8944286).

11621218 is a wasteful number, since it uses less digits than its factorization.

11621218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26817.

The product of its digits is 192, while the sum is 22.

The square root of 11621218 is about 3408.9907597411. The cubic root of 11621218 is about 226.5081759220.

Adding to 11621218 its reverse (81212611), we get a palindrome (92833829).

The spelling of 11621218 in words is "eleven million, six hundred twenty-one thousand, two hundred eighteen".