20204407065 has 16 divisors (see below), whose sum is σ = 32573825856. Its totient is φ = 10693425600.

The previous prime is 20204407051. The next prime is 20204407081. The reversal of 20204407065 is 56070440202.

It is not a de Polignac number, because 20204407065 - 2⁸ = 20204406809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5139106 + ... + 5143035.

It is an arithmetic number, because the mean of its divisors is an integer number (2035864116).

Almost surely, 2^20204407065 is an apocalyptic number.

It is an amenable number.

20204407065 is a deficient number, since it is larger than the sum of its proper divisors (12369418791).

20204407065 is a wasteful number, since it uses less digits than its factorization.

20204407065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282280.

The product of its (nonzero) digits is 13440, while the sum is 30.

Adding to 20204407065 its reverse (56070440202), we get a palindrome (76274847267).

The spelling of 20204407065 in words is "twenty billion, two hundred four million, four hundred seven thousand, sixty-five".