205410434 has 16 divisors (see below), whose sum is σ = 311101440. Its totient is φ = 101714400.

The previous prime is 205410431. The next prime is 205410461. The reversal of 205410434 is 434014502.

It is not an unprimeable number, because it can be changed into a prime (205410431) 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 7 ways as a sum of consecutive naturals, for example, 122687 + ... + 124349.

It is an arithmetic number, because the mean of its divisors is an integer number (19443840).

Almost surely, 2^205410434 is an apocalyptic number.

205410434 is a deficient number, since it is larger than the sum of its proper divisors (105691006).

205410434 is a wasteful number, since it uses less digits than its factorization.

205410434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 205410434 is about 14332.1468733753. The cubic root of 205410434 is about 590.0300990103.

Adding to 205410434 its reverse (434014502), we get a palindrome (639424936).

The spelling of 205410434 in words is "two hundred five million, four hundred ten thousand, four hundred thirty-four".