20313145222515 has 128 divisors (see below), whose sum is σ = 38235002572800. Its totient is φ = 10214515100160.

The previous prime is 20313145222499. The next prime is 20313145222561. The reversal of 20313145222515 is 51522254131302.

20313145222515 is a `hidden beast` number, since 2 + 0 + 3 + 131 + 4 + 5 + 2 + 2 + 2 + 515 = 666.

It is not a de Polignac number, because 20313145222515 - 2⁴ = 20313145222499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20313145222515.

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 127 ways as a sum of consecutive naturals, for example, 922014550 + ... + 922036580.

It is an arithmetic number, because the mean of its divisors is an integer number (298710957600).

Almost surely, 2^{20313145222515} is an apocalyptic number.

20313145222515 is a deficient number, since it is larger than the sum of its proper divisors (17921857350285).

20313145222515 is a wasteful number, since it uses less digits than its factorization.

20313145222515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27594 (or 27588 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 20313145222515 its reverse (51522254131302), we get a palindrome (71835399353817).

The spelling of 20313145222515 in words is "twenty trillion, three hundred thirteen billion, one hundred forty-five million, two hundred twenty-two thousand, five hundred fifteen".