18658528841 has 2 divisors, whose sum is σ = 18658528842. Its totient is φ = 18658528840.

The previous prime is 18658528783. The next prime is 18658528849. The reversal of 18658528841 is 14882585681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15520176400 + 3138352441 = 124580^2 + 56021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18658528841 is a prime.

It is not a weakly prime, because it can be changed into another prime (18658528849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9329264420 + 9329264421.

It is an arithmetic number, because the mean of its divisors is an integer number (9329264421).

Almost surely, 2^18658528841 is an apocalyptic number.

It is an amenable number.

18658528841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18658528841 is an equidigital number, since it uses as much as digits as its factorization.

18658528841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4915200, while the sum is 56.

The spelling of 18658528841 in words is "eighteen billion, six hundred fifty-eight million, five hundred twenty-eight thousand, eight hundred forty-one".