205030994 has 20 divisors (see below), whose sum is σ = 358791294. Its totient is φ = 87868368.

The previous prime is 205030961. The next prime is 205030997. The reversal of 205030994 is 499030502.

It can be written as a sum of positive squares in only one way, i.e., 197767969 + 7263025 = 14063^2 + 2695^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 205030994.

It is not an unprimeable number, because it can be changed into a prime (205030997) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 16547 + ... + 26150.

Almost surely, 2^205030994 is an apocalyptic number.

205030994 is a deficient number, since it is larger than the sum of its proper divisors (153760300).

205030994 is an frugal number, since it uses more digits than its factorization.

205030994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42727 (or 42706 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 205030994 is about 14318.9033797983. The cubic root of 205030994 is about 589.6665682795. Note that the first 3 decimals are identical.

The spelling of 205030994 in words is "two hundred five million, thirty thousand, nine hundred ninety-four".