20686451170627 has 4 divisors (see below), whose sum is σ = 22567037640696. Its totient is φ = 18805864700560.

The previous prime is 20686451170577. The next prime is 20686451170643. The reversal of 20686451170627 is 72607115468602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20686451170627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20686451173627) 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, 940293235018 + ... + 940293235039.

It is an arithmetic number, because the mean of its divisors is an integer number (5641759410174).

Almost surely, 2^{20686451170627} is an apocalyptic number.

20686451170627 is a deficient number, since it is larger than the sum of its proper divisors (1880586470069).

20686451170627 is a wasteful number, since it uses less digits than its factorization.

20686451170627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880586470068.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 20686451170627 in words is "twenty trillion, six hundred eighty-six billion, four hundred fifty-one million, one hundred seventy thousand, six hundred twenty-seven".