20313120342563 has 16 divisors (see below), whose sum is σ = 21772767313920. Its totient is φ = 18895651197696.

The previous prime is 20313120342547. The next prime is 20313120342577. The reversal of 20313120342563 is 36524302131302.

It is a cyclic number.

It is not a de Polignac number, because 20313120342563 - 2⁴ = 20313120342547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313120342583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43158731 + ... + 43626852.

It is an arithmetic number, because the mean of its divisors is an integer number (1360797957120).

Almost surely, 2^{20313120342563} is an apocalyptic number.

20313120342563 is a deficient number, since it is larger than the sum of its proper divisors (1459646971357).

20313120342563 is a wasteful number, since it uses less digits than its factorization.

20313120342563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86785826.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 20313120342563 its reverse (36524302131302), we get a palindrome (56837422473865).

The spelling of 20313120342563 in words is "twenty trillion, three hundred thirteen billion, one hundred twenty million, three hundred forty-two thousand, five hundred sixty-three".