18081800141 has 2 divisors, whose sum is σ = 18081800142. Its totient is φ = 18081800140.

The previous prime is 18081800119. The next prime is 18081800153. The reversal of 18081800141 is 14100818081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16142718916 + 1939081225 = 127054^2 + 44035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18081800141 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18081800098 and 18081800107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18081800161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040900070 + 9040900071.

It is an arithmetic number, because the mean of its divisors is an integer number (9040900071).

Almost surely, 2^18081800141 is an apocalyptic number.

It is an amenable number.

18081800141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18081800141 is an equidigital number, since it uses as much as digits as its factorization.

18081800141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 32.

The spelling of 18081800141 in words is "eighteen billion, eighty-one million, eight hundred thousand, one hundred forty-one".