20627986844653 has 4 divisors (see below), whose sum is σ = 20628096258940. Its totient is φ = 20627877430368.

The previous prime is 20627986844639. The next prime is 20627986844669. The reversal of 20627986844653 is 35644868972602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10077462948004 + 10550523896649 = 3174502^2 + 3248157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20627986844653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20627986844623) 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 3 ways as a sum of consecutive naturals, for example, 54423858 + ... + 54801571.

It is an arithmetic number, because the mean of its divisors is an integer number (5157024064735).

Almost surely, 2^{20627986844653} is an apocalyptic number.

It is an amenable number.

20627986844653 is a deficient number, since it is larger than the sum of its proper divisors (109414287).

20627986844653 is a wasteful number, since it uses less digits than its factorization.

20627986844653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109414286.

The product of its (nonzero) digits is 836075520, while the sum is 70.

The spelling of 20627986844653 in words is "twenty trillion, six hundred twenty-seven billion, nine hundred eighty-six million, eight hundred forty-four thousand, six hundred fifty-three".