21826222 has 12 divisors (see below), whose sum is σ = 35986608. Its totient is φ = 9920900.

The previous prime is 21826213. The next prime is 21826223. The reversal of 21826222 is 22262812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21826223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44854 + ... + 45337.

It is an arithmetic number, because the mean of its divisors is an integer number (2998884).

Almost surely, 2^21826222 is an apocalyptic number.

21826222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21826222 is a deficient number, since it is larger than the sum of its proper divisors (14160386).

21826222 is a wasteful number, since it uses less digits than its factorization.

21826222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90215 (or 90204 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 21826222 is about 4671.8542357398. The cubic root of 21826222 is about 279.4642049733.

The spelling of 21826222 in words is "twenty-one million, eight hundred twenty-six thousand, two hundred twenty-two".