20844443 has 2 divisors, whose sum is σ = 20844444. Its totient is φ = 20844442.

The previous prime is 20844433. The next prime is 20844451. The reversal of 20844443 is 34444802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20844443 - 2¹⁸ = 20582299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20844433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10422221 + 10422222.

It is an arithmetic number, because the mean of its divisors is an integer number (10422222).

Almost surely, 2^20844443 is an apocalyptic number.

20844443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20844443 is an equidigital number, since it uses as much as digits as its factorization.

20844443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 20844443 is about 4565.5714866816. The cubic root of 20844443 is about 275.2095064644.

The spelling of 20844443 in words is "twenty million, eight hundred forty-four thousand, four hundred forty-three".