21823682 has 8 divisors (see below), whose sum is σ = 34661196. Its totient is φ = 10269952.

The previous prime is 21823679. The next prime is 21823691. The reversal of 21823682 is 28632812.

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 654481 = 4601^2 + 809^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320903 + ... + 320970.

Almost surely, 2^21823682 is an apocalyptic number.

21823682 is a deficient number, since it is larger than the sum of its proper divisors (12837514).

21823682 is a wasteful number, since it uses less digits than its factorization.

21823682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641892.

The product of its digits is 9216, while the sum is 32.

The square root of 21823682 is about 4671.5823871575. The cubic root of 21823682 is about 279.4533637839.

The spelling of 21823682 in words is "twenty-one million, eight hundred twenty-three thousand, six hundred eighty-two".