21943226 has 32 divisors (see below), whose sum is σ = 36495360. Its totient is φ = 9849600.

The previous prime is 21943213. The next prime is 21943231. The reversal of 21943226 is 62234912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114791 + ... + 114981.

It is an arithmetic number, because the mean of its divisors is an integer number (1140480).

Almost surely, 2^21943226 is an apocalyptic number.

21943226 is a deficient number, since it is larger than the sum of its proper divisors (14552134).

21943226 is a wasteful number, since it uses less digits than its factorization.

21943226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350.

The product of its digits is 5184, while the sum is 29.

The square root of 21943226 is about 4684.3597214561. The cubic root of 21943226 is about 279.9626906071.

The spelling of 21943226 in words is "twenty-one million, nine hundred forty-three thousand, two hundred twenty-six".