20286443 has 2 divisors, whose sum is σ = 20286444. Its totient is φ = 20286442.

The previous prime is 20286421. The next prime is 20286449. The reversal of 20286443 is 34468202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20286443 - 2⁶ = 20286379 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20286449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143221 + 10143222.

It is an arithmetic number, because the mean of its divisors is an integer number (10143222).

Almost surely, 2^20286443 is an apocalyptic number.

20286443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20286443 is an equidigital number, since it uses as much as digits as its factorization.

20286443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 20286443 is about 4504.0474020596. The cubic root of 20286443 is about 272.7315003823.

The spelling of 20286443 in words is "twenty million, two hundred eighty-six thousand, four hundred forty-three".