20110171189 has 2 divisors, whose sum is σ = 20110171190. Its totient is φ = 20110171188.

The previous prime is 20110171153. The next prime is 20110171219. The reversal of 20110171189 is 98117101102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14729948689 + 5380222500 = 121367^2 + 73350^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110171189 - 2⁷ = 20110171061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20110171189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110171589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055085594 + 10055085595.

It is an arithmetic number, because the mean of its divisors is an integer number (10055085595).

Almost surely, 2^20110171189 is an apocalyptic number.

It is an amenable number.

20110171189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110171189 is an equidigital number, since it uses as much as digits as its factorization.

20110171189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 31.

The spelling of 20110171189 in words is "twenty billion, one hundred ten million, one hundred seventy-one thousand, one hundred eighty-nine".