205000542105 has 16 divisors (see below), whose sum is σ = 328119047424. Its totient is φ = 109294229120.

The previous prime is 205000542083. The next prime is 205000542139. The reversal of 205000542105 is 501245000502.

It is a happy number.

It is not a de Polignac number, because 205000542105 - 2⁸ = 205000541849 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2419041 + ... + 2502350.

It is an arithmetic number, because the mean of its divisors is an integer number (20507440464).

Almost surely, 2^205000542105 is an apocalyptic number.

It is an amenable number.

205000542105 is a deficient number, since it is larger than the sum of its proper divisors (123118505319).

205000542105 is a wasteful number, since it uses less digits than its factorization.

205000542105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924176.

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 205000542105 its reverse (501245000502), we get a palindrome (706245542607).

The spelling of 205000542105 in words is "two hundred five billion, five hundred forty-two thousand, one hundred five".