204087434 has 4 divisors (see below), whose sum is σ = 306131154. Its totient is φ = 102043716.

The previous prime is 204087421. The next prime is 204087437. The reversal of 204087434 is 434780402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 183521209 + 20566225 = 13547^2 + 4535^2 .

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 204087434.

It is not an unprimeable number, because it can be changed into a prime (204087437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51021857 + ... + 51021860.

Almost surely, 2^204087434 is an apocalyptic number.

204087434 is a deficient number, since it is larger than the sum of its proper divisors (102043720).

204087434 is a wasteful number, since it uses less digits than its factorization.

204087434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102043719.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 204087434 is about 14285.9173314142. The cubic root of 204087434 is about 588.7606215450.

The spelling of 204087434 in words is "two hundred four million, eighty-seven thousand, four hundred thirty-four".