206021450513 has 2 divisors, whose sum is σ = 206021450514. Its totient is φ = 206021450512.

The previous prime is 206021450491. The next prime is 206021450539. The reversal of 206021450513 is 315054120602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143177478544 + 62843971969 = 378388^2 + 250687^2 .

It is a cyclic number.

It is not a de Polignac number, because 206021450513 - 2⁶ = 206021450449 is a prime.

It is not a weakly prime, because it can be changed into another prime (206021450573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103010725256 + 103010725257.

It is an arithmetic number, because the mean of its divisors is an integer number (103010725257).

Almost surely, 2^206021450513 is an apocalyptic number.

It is an amenable number.

206021450513 is a deficient number, since it is larger than the sum of its proper divisors (1).

206021450513 is an equidigital number, since it uses as much as digits as its factorization.

206021450513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 206021450513 in words is "two hundred six billion, twenty-one million, four hundred fifty thousand, five hundred thirteen".