206140005 has 32 divisors (see below), whose sum is σ = 375419520. Its totient is φ = 107256960.

The previous prime is 206140001. The next prime is 206140027. The reversal of 206140005 is 500041602.

It is a happy number.

It is not a de Polignac number, because 206140005 - 2² = 206140001 is a prime.

It is a super-2 number, since 2×206140005² = 84987403322800050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206140005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206140001) 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 in 31 ways as a sum of consecutive naturals, for example, 13087 + ... + 24156.

It is an arithmetic number, because the mean of its divisors is an integer number (11731860).

Almost surely, 2^206140005 is an apocalyptic number.

It is an amenable number.

206140005 is a deficient number, since it is larger than the sum of its proper divisors (169279515).

206140005 is a wasteful number, since it uses less digits than its factorization.

206140005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37298 (or 37292 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 206140005 is about 14357.5765712741. The cubic root of 206140005 is about 590.7278243755.

Adding to 206140005 its reverse (500041602), we get a palindrome (706181607).

The spelling of 206140005 in words is "two hundred six million, one hundred forty thousand, five".