205120994 has 16 divisors (see below), whose sum is σ = 332122560. Its totient is φ = 94450320.

The previous prime is 205120987. The next prime is 205121003. The reversal of 205120994 is 499021502.

It is a self number, because there is not a number n which added to its sum of digits gives 205120994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2429 + ... + 20399.

It is an arithmetic number, because the mean of its divisors is an integer number (20757660).

Almost surely, 2^205120994 is an apocalyptic number.

205120994 is a deficient number, since it is larger than the sum of its proper divisors (127001566).

205120994 is a wasteful number, since it uses less digits than its factorization.

205120994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 205120994 is about 14322.0457337630. The cubic root of 205120994 is about 589.7528352821.

The spelling of 205120994 in words is "two hundred five million, one hundred twenty thousand, nine hundred ninety-four".