20013855276687 has 24 divisors (see below), whose sum is σ = 28770283115136. Its totient is φ = 12370284524928.

The previous prime is 20013855276671. The next prime is 20013855276697. The reversal of 20013855276687 is 78667255831002.

It is not a de Polignac number, because 20013855276687 - 2⁴ = 20013855276671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20013855276687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013855276697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172210803 + ... + 172326980.

It is an arithmetic number, because the mean of its divisors is an integer number (1198761796464).

Almost surely, 2^{20013855276687} is an apocalyptic number.

20013855276687 is a deficient number, since it is larger than the sum of its proper divisors (8756427838449).

20013855276687 is a wasteful number, since it uses less digits than its factorization.

20013855276687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344537887 (or 344537870 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 20013855276687 in words is "twenty trillion, thirteen billion, eight hundred fifty-five million, two hundred seventy-six thousand, six hundred eighty-seven".