20115065 has 8 divisors (see below), whose sum is σ = 24239688. Its totient is φ = 16024320.

The previous prime is 20115061. The next prime is 20115083. The reversal of 20115065 is 56051102.

It can be written as a sum of positive squares in 4 ways, for example, as 781456 + 19333609 = 884^2 + 4397^2 .

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

It is not a de Polignac number, because 20115065 - 2² = 20115061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20115061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7142 + ... + 9551.

It is an arithmetic number, because the mean of its divisors is an integer number (3029961).

Almost surely, 2^20115065 is an apocalyptic number.

It is an amenable number.

20115065 is a deficient number, since it is larger than the sum of its proper divisors (4124623).

20115065 is a wasteful number, since it uses less digits than its factorization.

20115065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16939.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 20115065 is about 4484.9821627293. The cubic root of 20115065 is about 271.9613239775.

Adding to 20115065 its reverse (56051102), we get a palindrome (76166167).

The spelling of 20115065 in words is "twenty million, one hundred fifteen thousand, sixty-five".