20686704084463 has 4 divisors (see below), whose sum is σ = 20686834683648. Its totient is φ = 20686573485280.

The previous prime is 20686704084451. The next prime is 20686704084479. The reversal of 20686704084463 is 36448040768602.

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

It is a cyclic number.

It is not a de Polignac number, because 20686704084463 - 2⁹ = 20686704083951 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20686704084398 and 20686704084407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686704084413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65061706 + ... + 65378887.

It is an arithmetic number, because the mean of its divisors is an integer number (5171708670912).

Almost surely, 2^{20686704084463} is an apocalyptic number.

20686704084463 is a deficient number, since it is larger than the sum of its proper divisors (130599185).

20686704084463 is a wasteful number, since it uses less digits than its factorization.

20686704084463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130599184.

The product of its (nonzero) digits is 37158912, while the sum is 58.

The spelling of 20686704084463 in words is "twenty trillion, six hundred eighty-six billion, seven hundred four million, eighty-four thousand, four hundred sixty-three".