22490218 has 8 divisors (see below), whose sum is σ = 35719812. Its totient is φ = 10583616.

The previous prime is 22490213. The next prime is 22490231. The reversal of 22490218 is 81209422.

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 1723969 = 4557^2 + 1313^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22490213) 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 3 ways as a sum of consecutive naturals, for example, 330705 + ... + 330772.

Almost surely, 2^22490218 is an apocalyptic number.

22490218 is a deficient number, since it is larger than the sum of its proper divisors (13229594).

22490218 is a wasteful number, since it uses less digits than its factorization.

22490218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661496.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22490218 is about 4742.3852648219. The cubic root of 22490218 is about 282.2698906698.

The spelling of 22490218 in words is "twenty-two million, four hundred ninety thousand, two hundred eighteen".