20146640707165 has 32 divisors (see below), whose sum is σ = 28532178026496. Its totient is φ = 13363940278080.

The previous prime is 20146640707163. The next prime is 20146640707177. The reversal of 20146640707165 is 56170704664102.

It is not a de Polignac number, because 20146640707165 - 2¹ = 20146640707163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146640707163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 891717 + ... + 6410026.

It is an arithmetic number, because the mean of its divisors is an integer number (891630563328).

Almost surely, 2^{20146640707165} is an apocalyptic number.

It is an amenable number.

20146640707165 is a deficient number, since it is larger than the sum of its proper divisors (8385537319331).

20146640707165 is a wasteful number, since it uses less digits than its factorization.

20146640707165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304329.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 20146640707165 in words is "twenty trillion, one hundred forty-six billion, six hundred forty million, seven hundred seven thousand, one hundred sixty-five".