18180324131 has 2 divisors, whose sum is σ = 18180324132. Its totient is φ = 18180324130.

The previous prime is 18180324119. The next prime is 18180324163. The reversal of 18180324131 is 13142308181.

It is an a-pointer prime, because the next prime (18180324163) can be obtained adding 18180324131 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18180324131 is a prime.

It is a super-2 number, since 2×18180324131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18180024131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9090162065 + 9090162066.

It is an arithmetic number, because the mean of its divisors is an integer number (9090162066).

Almost surely, 2^18180324131 is an apocalyptic number.

18180324131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18180324131 is an equidigital number, since it uses as much as digits as its factorization.

18180324131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 18180324131 in words is "eighteen billion, one hundred eighty million, three hundred twenty-four thousand, one hundred thirty-one".