205813064 has 8 divisors (see below), whose sum is σ = 385899510. Its totient is φ = 102906528.

The previous prime is 205813021. The next prime is 205813081. The reversal of 205813064 is 460318502.

It can be written as a sum of positive squares in only one way, i.e., 186540964 + 19272100 = 13658^2 + 4390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12863309 + ... + 12863324.

Almost surely, 2^205813064 is an apocalyptic number.

It is an amenable number.

205813064 is a deficient number, since it is larger than the sum of its proper divisors (180086446).

205813064 is a wasteful number, since it uses less digits than its factorization.

205813064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25726639 (or 25726635 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 205813064 is about 14346.1863922089. The cubic root of 205813064 is about 590.4153581956.

The spelling of 205813064 in words is "two hundred five million, eight hundred thirteen thousand, sixty-four".