20120013181 has 2 divisors, whose sum is σ = 20120013182. Its totient is φ = 20120013180.

The previous prime is 20120013149. The next prime is 20120013253. The reversal of 20120013181 is 18131002102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15409249956 + 4710763225 = 124134^2 + 68635^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120013181 - 2⁵ = 20120013149 is a prime.

It is a super-2 number, since 2×20120013181² (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 (20120014181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060006590 + 10060006591.

It is an arithmetic number, because the mean of its divisors is an integer number (10060006591).

Almost surely, 2^20120013181 is an apocalyptic number.

It is an amenable number.

20120013181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120013181 is an equidigital number, since it uses as much as digits as its factorization.

20120013181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20120013181 its reverse (18131002102), we get a palindrome (38251015283).

The spelling of 20120013181 in words is "twenty billion, one hundred twenty million, thirteen thousand, one hundred eighty-one".