20813587186803 has 16 divisors (see below), whose sum is σ = 28397988051840. Its totient is φ = 13552481827584.

The previous prime is 20813587186789. The next prime is 20813587186831. The reversal of 20813587186803 is 30868178531802.

It is not a de Polignac number, because 20813587186803 - 2²⁸ = 20813318751347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20813587186303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90526 + ... + 6452547.

It is an arithmetic number, because the mean of its divisors is an integer number (1774874253240).

Almost surely, 2^{20813587186803} is an apocalyptic number.

20813587186803 is a deficient number, since it is larger than the sum of its proper divisors (7584400865037).

20813587186803 is a wasteful number, since it uses less digits than its factorization.

20813587186803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567778.

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 20813587186803 in words is "twenty trillion, eight hundred thirteen billion, five hundred eighty-seven million, one hundred eighty-six thousand, eight hundred three".