204642465 has 32 divisors (see below), whose sum is σ = 335909376. Its totient is φ = 106337280.

The previous prime is 204642457. The next prime is 204642467. The reversal of 204642465 is 564246402.

It is not a de Polignac number, because 204642465 - 2³ = 204642457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204642467) 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 31 ways as a sum of consecutive naturals, for example, 197589 + ... + 198621.

It is an arithmetic number, because the mean of its divisors is an integer number (10497168).

Almost surely, 2^204642465 is an apocalyptic number.

It is an amenable number.

204642465 is a deficient number, since it is larger than the sum of its proper divisors (131266911).

204642465 is a wasteful number, since it uses less digits than its factorization.

204642465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 204642465 is about 14305.3299507561. The cubic root of 204642465 is about 589.2938645810.

Adding to 204642465 its reverse (564246402), we get a palindrome (768888867).

The spelling of 204642465 in words is "two hundred four million, six hundred forty-two thousand, four hundred sixty-five".