206236344421 has 2 divisors, whose sum is σ = 206236344422. Its totient is φ = 206236344420.

The previous prime is 206236344403. The next prime is 206236344439. The reversal of 206236344421 is 124443632602.

It is a balanced prime because it is at equal distance from previous prime (206236344403) and next prime (206236344439).

It can be written as a sum of positive squares in only one way, i.e., 206103288196 + 133056225 = 453986^2 + 11535^2 .

It is a cyclic number.

It is not a de Polignac number, because 206236344421 - 2⁵ = 206236344389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206236344401) 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, 103118172210 + 103118172211.

It is an arithmetic number, because the mean of its divisors is an integer number (103118172211).

Almost surely, 2^206236344421 is an apocalyptic number.

It is an amenable number.

206236344421 is a deficient number, since it is larger than the sum of its proper divisors (1).

206236344421 is an equidigital number, since it uses as much as digits as its factorization.

206236344421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 206236344421 in words is "two hundred six billion, two hundred thirty-six million, three hundred forty-four thousand, four hundred twenty-one".