205020465 has 32 divisors (see below), whose sum is σ = 354727296. Its totient is φ = 100515840.

The previous prime is 205020449. The next prime is 205020499. The reversal of 205020465 is 564020502.

It is not a de Polignac number, because 205020465 - 2⁴ = 205020449 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 48070 + ... + 52160.

It is an arithmetic number, because the mean of its divisors is an integer number (11085228).

Almost surely, 2^205020465 is an apocalyptic number.

It is an amenable number.

205020465 is a deficient number, since it is larger than the sum of its proper divisors (149706831).

205020465 is a wasteful number, since it uses less digits than its factorization.

205020465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 205020465 is about 14318.5357142412. The cubic root of 205020465 is about 589.6564743494.

Adding to 205020465 its reverse (564020502), we get a palindrome (769040967).

The spelling of 205020465 in words is "two hundred five million, twenty thousand, four hundred sixty-five".