18653760481 has 2 divisors, whose sum is σ = 18653760482. Its totient is φ = 18653760480.

The previous prime is 18653760439. The next prime is 18653760539. The reversal of 18653760481 is 18406735681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12727224225 + 5926536256 = 112815^2 + 76984^2 .

It is a cyclic number.

It is not a de Polignac number, because 18653760481 - 2⁷ = 18653760353 is a prime.

It is a super-2 number, since 2×18653760481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18653760781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9326880240 + 9326880241.

It is an arithmetic number, because the mean of its divisors is an integer number (9326880241).

Almost surely, 2^18653760481 is an apocalyptic number.

It is an amenable number.

18653760481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18653760481 is an equidigital number, since it uses as much as digits as its factorization.

18653760481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 18653760481 in words is "eighteen billion, six hundred fifty-three million, seven hundred sixty thousand, four hundred eighty-one".