21246226 has 16 divisors (see below), whose sum is σ = 33942240. Its totient is φ = 9939520.

The previous prime is 21246221. The next prime is 21246229. The reversal of 21246226 is 62264212.

It is a self number, because there is not a number n which added to its sum of digits gives 21246226.

It is not an unprimeable number, because it can be changed into a prime (21246221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341 + ... + 7831.

It is an arithmetic number, because the mean of its divisors is an integer number (2121390).

Almost surely, 2^21246226 is an apocalyptic number.

21246226 is a deficient number, since it is larger than the sum of its proper divisors (12696014).

21246226 is a wasteful number, since it uses less digits than its factorization.

21246226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689.

The product of its digits is 2304, while the sum is 25.

The square root of 21246226 is about 4609.3628626959. The cubic root of 21246226 is about 276.9665144785.

The spelling of 21246226 in words is "twenty-one million, two hundred forty-six thousand, two hundred twenty-six".