20516225514463 has 24 divisors (see below), whose sum is σ = 24773308116480. Its totient is φ = 16922994021360.

The previous prime is 20516225514443. The next prime is 20516225514487. The reversal of 20516225514463 is 36441552261502.

It is not a de Polignac number, because 20516225514463 - 2⁴¹ = 18317202258911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516225514443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37455481 + ... + 37999282.

It is an arithmetic number, because the mean of its divisors is an integer number (1032221171520).

Almost surely, 2^{20516225514463} is an apocalyptic number.

20516225514463 is a deficient number, since it is larger than the sum of its proper divisors (4257082602017).

20516225514463 is a wasteful number, since it uses less digits than its factorization.

20516225514463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75454987 (or 75454980 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

Adding to 20516225514463 its reverse (36441552261502), we get a palindrome (56957777775965).

The spelling of 20516225514463 in words is "twenty trillion, five hundred sixteen billion, two hundred twenty-five million, five hundred fourteen thousand, four hundred sixty-three".