20315100644641 has 16 divisors (see below), whose sum is σ = 23480680966848. Its totient is φ = 17370711577600.

The previous prime is 20315100644627. The next prime is 20315100644647. The reversal of 20315100644641 is 14644600151302.

It is a cyclic number.

It is not a de Polignac number, because 20315100644641 - 2⁵ = 20315100644609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20315100644641.

It is not an unprimeable number, because it can be changed into a prime (20315100644647) 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, 34686055 + ... + 35266876.

It is an arithmetic number, because the mean of its divisors is an integer number (1467542560428).

Almost surely, 2^{20315100644641} is an apocalyptic number.

It is an amenable number.

20315100644641 is a deficient number, since it is larger than the sum of its proper divisors (3165580322207).

20315100644641 is a wasteful number, since it uses less digits than its factorization.

20315100644641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69954512.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 20315100644641 its reverse (14644600151302), we get a palindrome (34959700795943).

The spelling of 20315100644641 in words is "twenty trillion, three hundred fifteen billion, one hundred million, six hundred forty-four thousand, six hundred forty-one".