20656747167 has 16 divisors (see below), whose sum is σ = 32208971520. Its totient is φ = 11529346752.

The previous prime is 20656747159. The next prime is 20656747193. The reversal of 20656747167 is 76174765602.

It is a happy number.

It is not a de Polignac number, because 20656747167 - 2³ = 20656747159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20656747117) 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, 11436942 + ... + 11438747.

It is an arithmetic number, because the mean of its divisors is an integer number (2013060720).

Almost surely, 2^20656747167 is an apocalyptic number.

20656747167 is a deficient number, since it is larger than the sum of its proper divisors (11552224353).

20656747167 is a wasteful number, since it uses less digits than its factorization.

20656747167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22875742.

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 20656747167 in words is "twenty billion, six hundred fifty-six million, seven hundred forty-seven thousand, one hundred sixty-seven".