18996226 has 4 divisors (see below), whose sum is σ = 28494342. Its totient is φ = 9498112.

The previous prime is 18996223. The next prime is 18996233. The reversal of 18996226 is 62269981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62269981 = 3163 ⋅19687.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 65025 = 4351^2 + 255^2 .

It is not an unprimeable number, because it can be changed into a prime (18996221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4749055 + ... + 4749058.

Almost surely, 2^18996226 is an apocalyptic number.

18996226 is a deficient number, since it is larger than the sum of its proper divisors (9498116).

18996226 is an equidigital number, since it uses as much as digits as its factorization.

18996226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9498115.

The product of its digits is 93312, while the sum is 43.

The square root of 18996226 is about 4358.4660145514. The cubic root of 18996226 is about 266.8224960745.

The spelling of 18996226 in words is "eighteen million, nine hundred ninety-six thousand, two hundred twenty-six".