18969226 has 4 divisors (see below), whose sum is σ = 28453842. Its totient is φ = 9484612.

The previous prime is 18969221. The next prime is 18969233. The reversal of 18969226 is 62296981.

18969226 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62296981 = 43 ⋅1448767.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 38025 = 4351^2 + 195^2 .

It is not an unprimeable number, because it can be changed into a prime (18969221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4742305 + ... + 4742308.

Almost surely, 2^18969226 is an apocalyptic number.

18969226 is a deficient number, since it is larger than the sum of its proper divisors (9484616).

18969226 is an equidigital number, since it uses as much as digits as its factorization.

18969226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484615.

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

The square root of 18969226 is about 4355.3674931055. The cubic root of 18969226 is about 266.6960214213.

The spelling of 18969226 in words is "eighteen million, nine hundred sixty-nine thousand, two hundred twenty-six".