20844386 has 8 divisors (see below), whose sum is σ = 31429164. Its totient is φ = 10368000.

The previous prime is 20844361. The next prime is 20844389. The reversal of 20844386 is 68344802.

It can be written as a sum of positive squares in 2 ways, for example, as 19193161 + 1651225 = 4381^2 + 1285^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20844389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26615 + ... + 27386.

Almost surely, 2^20844386 is an apocalyptic number.

20844386 is a deficient number, since it is larger than the sum of its proper divisors (10584778).

20844386 is a wasteful number, since it uses less digits than its factorization.

20844386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54196.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 20844386 is about 4565.5652443044. The cubic root of 20844386 is about 275.2092556069.

The spelling of 20844386 in words is "twenty million, eight hundred forty-four thousand, three hundred eighty-six".