18730329481 has 2 divisors, whose sum is σ = 18730329482. Its totient is φ = 18730329480.

The previous prime is 18730329469. The next prime is 18730329491. The reversal of 18730329481 is 18492303781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18500352256 + 229977225 = 136016^2 + 15165^2 .

It is a cyclic number.

It is not a de Polignac number, because 18730329481 - 2⁷ = 18730329353 is a prime.

It is a super-2 number, since 2×18730329481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18730329461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9365164740 + 9365164741.

It is an arithmetic number, because the mean of its divisors is an integer number (9365164741).

Almost surely, 2^18730329481 is an apocalyptic number.

It is an amenable number.

18730329481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18730329481 is an equidigital number, since it uses as much as digits as its factorization.

18730329481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 18730329481 in words is "eighteen billion, seven hundred thirty million, three hundred twenty-nine thousand, four hundred eighty-one".