20056870161 has 40 divisors (see below), whose sum is σ = 30135017088. Its totient is φ = 13294044000.

The previous prime is 20056870153. The next prime is 20056870217. The reversal of 20056870161 is 16107865002.

20056870161 is a `hidden beast` number, since 20 + 0 + 568 + 70 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 20056870161 - 2³ = 20056870153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20056870111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20655406 + ... + 20656376.

Almost surely, 2^20056870161 is an apocalyptic number.

It is an amenable number.

20056870161 is a deficient number, since it is larger than the sum of its proper divisors (10078146927).

20056870161 is an equidigital number, since it uses as much as digits as its factorization.

20056870161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195 (or 2186 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 20056870161 in words is "twenty billion, fifty-six million, eight hundred seventy thousand, one hundred sixty-one".