18468730061 has 2 divisors, whose sum is σ = 18468730062. Its totient is φ = 18468730060.

The previous prime is 18468730051. The next prime is 18468730109. The reversal of 18468730061 is 16003786481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16130524036 + 2338206025 = 127006^2 + 48355^2 .

It is an emirp because it is prime and its reverse (16003786481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18468730061 - 2⁶ = 18468729997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18468729994 and 18468730021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18468730001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234365030 + 9234365031.

It is an arithmetic number, because the mean of its divisors is an integer number (9234365031).

Almost surely, 2^18468730061 is an apocalyptic number.

It is an amenable number.

18468730061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468730061 is an equidigital number, since it uses as much as digits as its factorization.

18468730061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 18468730061 in words is "eighteen billion, four hundred sixty-eight million, seven hundred thirty thousand, sixty-one".