21826226 has 8 divisors (see below), whose sum is σ = 33624300. Its totient is φ = 10618128.

The previous prime is 21826223. The next prime is 21826237. The reversal of 21826226 is 62262812.

It can be written as a sum of positive squares in 2 ways, for example, as 14830201 + 6996025 = 3851^2 + 2645^2 .

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 (21826223) 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 3 ways as a sum of consecutive naturals, for example, 147401 + ... + 147548.

Almost surely, 2^21826226 is an apocalyptic number.

21826226 is a deficient number, since it is larger than the sum of its proper divisors (11798074).

21826226 is a wasteful number, since it uses less digits than its factorization.

21826226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294988.

The product of its digits is 4608, while the sum is 29.

The square root of 21826226 is about 4671.8546638353. The cubic root of 21826226 is about 279.4642220453.

The spelling of 21826226 in words is "twenty-one million, eight hundred twenty-six thousand, two hundred twenty-six".