205070930 has 16 divisors (see below), whose sum is σ = 378131544. Its totient is φ = 80027520.

The previous prime is 205070927. The next prime is 205070941. The reversal of 205070930 is 39070502.

It can be written as a sum of positive squares in 4 ways, for example, as 177076249 + 27994681 = 13307^2 + 5291^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205070930.

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 in 7 ways as a sum of consecutive naturals, for example, 249677 + ... + 250496.

Almost surely, 2^205070930 is an apocalyptic number.

205070930 is a deficient number, since it is larger than the sum of its proper divisors (173060614).

205070930 is a wasteful number, since it uses less digits than its factorization.

205070930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500221.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 205070930 is about 14320.2978320983. The cubic root of 205070930 is about 589.7048509392.

The spelling of 205070930 in words is "two hundred five million, seventy thousand, nine hundred thirty".