20315316345165 has 16 divisors (see below), whose sum is σ = 36116117947200. Its totient is φ = 10834835384016.

The previous prime is 20315316345161. The next prime is 20315316345173. The reversal of 20315316345165 is 56154361351302.

20315316345165 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 5 + 3 + 1 + 634 + 5 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 20315316345165 - 2² = 20315316345161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20315316345165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315316345161) 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 15 ways as a sum of consecutive naturals, for example, 75241912255 + ... + 75241912524.

It is an arithmetic number, because the mean of its divisors is an integer number (2257257371700).

Almost surely, 2^{20315316345165} is an apocalyptic number.

It is an amenable number.

20315316345165 is a deficient number, since it is larger than the sum of its proper divisors (15800801602035).

20315316345165 is a wasteful number, since it uses less digits than its factorization.

20315316345165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150483824793 (or 150483824787 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

Adding to 20315316345165 its reverse (56154361351302), we get a palindrome (76469677696467).

The spelling of 20315316345165 in words is "twenty trillion, three hundred fifteen billion, three hundred sixteen million, three hundred forty-five thousand, one hundred sixty-five".