20140843 has 2 divisors, whose sum is σ = 20140844. Its totient is φ = 20140842.

The previous prime is 20140831. The next prime is 20140849. The reversal of 20140843 is 34804102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20140843 - 2⁹ = 20140331 is a prime.

It is not a weakly prime, because it can be changed into another prime (20140849) 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 as a sum of consecutive naturals, namely, 10070421 + 10070422.

It is an arithmetic number, because the mean of its divisors is an integer number (10070422).

Almost surely, 2^20140843 is an apocalyptic number.

20140843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140843 is an equidigital number, since it uses as much as digits as its factorization.

20140843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20140843 is about 4487.8550555917. The cubic root of 20140843 is about 272.0774496504.

Adding to 20140843 its reverse (34804102), we get a palindrome (54944945).

The spelling of 20140843 in words is "twenty million, one hundred forty thousand, eight hundred forty-three".