20110171161 has 4 divisors (see below), whose sum is σ = 26813561552. Its totient is φ = 13406780772.

The previous prime is 20110171153. The next prime is 20110171189. The reversal of 20110171161 is 16117101102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20110171161 - 2³ = 20110171153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110171111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351695191 + ... + 3351695196.

It is an arithmetic number, because the mean of its divisors is an integer number (6703390388).

Almost surely, 2^20110171161 is an apocalyptic number.

It is an amenable number.

20110171161 is a deficient number, since it is larger than the sum of its proper divisors (6703390391).

20110171161 is an equidigital number, since it uses as much as digits as its factorization.

20110171161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703390390.

The product of its (nonzero) digits is 84, while the sum is 21.

Adding to 20110171161 its reverse (16117101102), we get a palindrome (36227272263).

It can be divided in two parts, 20110 and 171161, that added together give a triangular number (191271 = T₆₁₈).

The spelling of 20110171161 in words is "twenty billion, one hundred ten million, one hundred seventy-one thousand, one hundred sixty-one".