21094226 has 8 divisors (see below), whose sum is σ = 32075004. Its totient is φ = 10402560.

The previous prime is 21094217. The next prime is 21094253. The reversal of 21094226 is 62249012.

It can be written as a sum of positive squares in 2 ways, for example, as 17850625 + 3243601 = 4225^2 + 1801^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21094195 and 21094204.

It is an unprimeable number.

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, 72095 + ... + 72386.

Almost surely, 2^21094226 is an apocalyptic number.

21094226 is a deficient number, since it is larger than the sum of its proper divisors (10980778).

21094226 is a wasteful number, since it uses less digits than its factorization.

21094226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144556.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 21094226 is about 4592.8450877425. The cubic root of 21094226 is about 276.3044407219.

The spelling of 21094226 in words is "twenty-one million, ninety-four thousand, two hundred twenty-six".