20130001181 has 2 divisors, whose sum is σ = 20130001182. Its totient is φ = 20130001180.

The previous prime is 20130001169. The next prime is 20130001201. The reversal of 20130001181 is 18110003102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11873371225 + 8256629956 = 108965^2 + 90866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20130001181 is a prime.

It is a super-2 number, since 2×20130001181² (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 (20130001141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065000590 + 10065000591.

It is an arithmetic number, because the mean of its divisors is an integer number (10065000591).

Almost surely, 2^20130001181 is an apocalyptic number.

It is an amenable number.

20130001181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130001181 is an equidigital number, since it uses as much as digits as its factorization.

20130001181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20130001181 its reverse (18110003102), we get a palindrome (38240004283).

The spelling of 20130001181 in words is "twenty billion, one hundred thirty million, one thousand, one hundred eighty-one".