206020459993 has 2 divisors, whose sum is σ = 206020459994. Its totient is φ = 206020459992.

The previous prime is 206020459991. The next prime is 206020460077. The reversal of 206020459993 is 399954020602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166224997849 + 39795462144 = 407707^2 + 199488^2 .

It is a cyclic number.

It is not a de Polignac number, because 206020459993 - 2¹ = 206020459991 is a prime.

Together with 206020459991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (206020459991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103010229996 + 103010229997.

It is an arithmetic number, because the mean of its divisors is an integer number (103010229997).

Almost surely, 2^206020459993 is an apocalyptic number.

It is an amenable number.

206020459993 is a deficient number, since it is larger than the sum of its proper divisors (1).

206020459993 is an equidigital number, since it uses as much as digits as its factorization.

206020459993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 206020459993 in words is "two hundred six billion, twenty million, four hundred fifty-nine thousand, nine hundred ninety-three".