20310315146505 has 16 divisors (see below), whose sum is σ = 36107226927360. Its totient is φ = 10832168078064.

The previous prime is 20310315146419. The next prime is 20310315146557. The reversal of 20310315146505 is 50564151301302.

20310315146505 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 0 + 3 + 1 + 5 + 146 + 505 = 666.

It is not a de Polignac number, because 20310315146505 - 2³⁰ = 20309241404681 is a prime.

It is a super-2 number, since 2×20310315146505² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20310315146505.

It is an unprimeable number.

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, 75223389297 + ... + 75223389566.

It is an arithmetic number, because the mean of its divisors is an integer number (2256701682960).

Almost surely, 2^{20310315146505} is an apocalyptic number.

It is an amenable number.

20310315146505 is a deficient number, since it is larger than the sum of its proper divisors (15796911780855).

20310315146505 is a wasteful number, since it uses less digits than its factorization.

20310315146505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150446778877 (or 150446778871 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 20310315146505 its reverse (50564151301302), we get a palindrome (70874466447807).

The spelling of 20310315146505 in words is "twenty trillion, three hundred ten billion, three hundred fifteen million, one hundred forty-six thousand, five hundred five".