206433605 has 16 divisors (see below), whose sum is σ = 283569024. Its totient is φ = 141324480.

The previous prime is 206433581. The next prime is 206433637. The reversal of 206433605 is 506334602.

It is not a de Polignac number, because 206433605 - 2²⁰ = 205385029 is a prime.

It is a super-2 number, since 2×206433605² = 85229666546592050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18674 + ... + 27596.

It is an arithmetic number, because the mean of its divisors is an integer number (17723064).

Almost surely, 2^206433605 is an apocalyptic number.

It is an amenable number.

206433605 is a deficient number, since it is larger than the sum of its proper divisors (77135419).

206433605 is an equidigital number, since it uses as much as digits as its factorization.

206433605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9596.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 206433605 is about 14367.7974999650. The cubic root of 206433605 is about 591.0081442376.

The spelling of 206433605 in words is "two hundred six million, four hundred thirty-three thousand, six hundred five".