21822968 has 24 divisors (see below), whose sum is σ = 43471200. Its totient is φ = 10268544.

The previous prime is 21822967. The next prime is 21822991. The reversal of 21822968 is 86922812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822961) 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, 2408 + ... + 7031.

It is an arithmetic number, because the mean of its divisors is an integer number (1811300).

Almost surely, 2^21822968 is an apocalyptic number.

It is an amenable number.

21822968 is a deficient number, since it is larger than the sum of its proper divisors (21648232).

21822968 is a wasteful number, since it uses less digits than its factorization.

21822968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479 (or 9458 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 21822968 is about 4671.5059670303. The cubic root of 21822968 is about 279.4503161485.

The spelling of 21822968 in words is "twenty-one million, eight hundred twenty-two thousand, nine hundred sixty-eight".