205016690 has 16 divisors (see below), whose sum is σ = 377612928. Its totient is φ = 80099376.

The previous prime is 205016677. The next prime is 205016701. The reversal of 205016690 is 96610502.

It is a super-2 number, since 2×205016690² = 84063686357112200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 237962 + ... + 238821.

It is an arithmetic number, because the mean of its divisors is an integer number (23600808).

Almost surely, 2^205016690 is an apocalyptic number.

205016690 is a deficient number, since it is larger than the sum of its proper divisors (172596238).

205016690 is a wasteful number, since it uses less digits than its factorization.

205016690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476833.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 205016690 is about 14318.4038914957. The cubic root of 205016690 is about 589.6528552524.

The spelling of 205016690 in words is "two hundred five million, sixteen thousand, six hundred ninety".