21382246 has 8 divisors (see below), whose sum is σ = 32552280. Its totient is φ = 10531488.

The previous prime is 21382241. The next prime is 21382247. The reversal of 21382246 is 64228312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21382241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79651 + ... + 79918.

It is an arithmetic number, because the mean of its divisors is an integer number (4069035).

Almost surely, 2^21382246 is an apocalyptic number.

21382246 is a deficient number, since it is larger than the sum of its proper divisors (11170034).

21382246 is a wasteful number, since it uses less digits than its factorization.

21382246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159638.

The product of its digits is 4608, while the sum is 28.

The square root of 21382246 is about 4624.0940734375. The cubic root of 21382246 is about 277.5563113816.

The spelling of 21382246 in words is "twenty-one million, three hundred eighty-two thousand, two hundred forty-six".