19226218 has 16 divisors (see below), whose sum is σ = 33312384. Its totient is φ = 8224960.

The previous prime is 19226213. The next prime is 19226239. The reversal of 19226218 is 81262291.

It is a self number, because there is not a number n which added to its sum of digits gives 19226218.

It is not an unprimeable number, because it can be changed into a prime (19226213) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 25330 + ... + 26077.

It is an arithmetic number, because the mean of its divisors is an integer number (2082024).

Almost surely, 2^19226218 is an apocalyptic number.

19226218 is a deficient number, since it is larger than the sum of its proper divisors (14086166).

19226218 is a wasteful number, since it uses less digits than its factorization.

19226218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51437.

The product of its digits is 3456, while the sum is 31.

The square root of 19226218 is about 4384.7711456814. The cubic root of 19226218 is about 267.8950078822.

The spelling of 19226218 in words is "nineteen million, two hundred twenty-six thousand, two hundred eighteen".