205030011 has 8 divisors (see below), whose sum is σ = 273731920. Its totient is φ = 136507392.

The previous prime is 205029997. The next prime is 205030019. The reversal of 205030011 is 110030502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205030011 - 2⁹ = 205029499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205030019) 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 7 ways as a sum of consecutive naturals, for example, 42130 + ... + 46743.

It is an arithmetic number, because the mean of its divisors is an integer number (34216490).

Almost surely, 2^205030011 is an apocalyptic number.

205030011 is a deficient number, since it is larger than the sum of its proper divisors (68701909).

205030011 is an equidigital number, since it uses as much as digits as its factorization.

205030011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89645.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 205030011 is about 14318.8690545029. The cubic root of 205030011 is about 589.6656259128.

Adding to 205030011 its reverse (110030502), we get a palindrome (315060513).

The spelling of 205030011 in words is "two hundred five million, thirty thousand, eleven".