20020110181 has 2 divisors, whose sum is σ = 20020110182. Its totient is φ = 20020110180.

The previous prime is 20020110169. The next prime is 20020110223. The reversal of 20020110181 is 18101102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19918805956 + 101304225 = 141134^2 + 10065^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020110181 - 2⁷ = 20020110053 is a prime.

It is a super-2 number, since 2×20020110181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020110881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010055090 + 10010055091.

It is an arithmetic number, because the mean of its divisors is an integer number (10010055091).

Almost surely, 2^20020110181 is an apocalyptic number.

It is an amenable number.

20020110181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020110181 is an equidigital number, since it uses as much as digits as its factorization.

20020110181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20020110181 its reverse (18101102002), we get a palindrome (38121212183).

The spelling of 20020110181 in words is "twenty billion, twenty million, one hundred ten thousand, one hundred eighty-one".