20686704478227 has 12 divisors (see below), whose sum is σ = 29886197851224. Its totient is φ = 13788642860160.

The previous prime is 20686704478213. The next prime is 20686704478277. The reversal of 20686704478227 is 72287440768602.

It is a happy number.

20686704478227 is a `hidden beast` number, since 20 + 6 + 8 + 6 + 70 + 447 + 82 + 27 = 666.

It is not a de Polignac number, because 20686704478227 - 2¹⁰ = 20686704477203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20686704478277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207735678 + ... + 207835235.

It is an arithmetic number, because the mean of its divisors is an integer number (2490516487602).

Almost surely, 2^{20686704478227} is an apocalyptic number.

20686704478227 is a deficient number, since it is larger than the sum of its proper divisors (9199493372997).

20686704478227 is a wasteful number, since it uses less digits than its factorization.

20686704478227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415576450 (or 415576447 counting only the distinct ones).

The product of its (nonzero) digits is 101154816, while the sum is 63.

The spelling of 20686704478227 in words is "twenty trillion, six hundred eighty-six billion, seven hundred four million, four hundred seventy-eight thousand, two hundred twenty-seven".