20120516065 has 8 divisors (see below), whose sum is σ = 26001897768. Its totient is φ = 14858227200.

The previous prime is 20120516063. The next prime is 20120516077. The reversal of 20120516065 is 56061502102.

It can be written as a sum of positive squares in 4 ways, for example, as 3127829329 + 16992686736 = 55927^2 + 130356^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20120516065 - 2¹ = 20120516063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120516063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154773136 + ... + 154773265.

It is an arithmetic number, because the mean of its divisors is an integer number (3250237221).

Almost surely, 2^20120516065 is an apocalyptic number.

It is an amenable number.

20120516065 is a deficient number, since it is larger than the sum of its proper divisors (5881381703).

20120516065 is a wasteful number, since it uses less digits than its factorization.

20120516065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309546419.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 20120516065 in words is "twenty billion, one hundred twenty million, five hundred sixteen thousand, sixty-five".