18245528491 has 2 divisors, whose sum is σ = 18245528492. Its totient is φ = 18245528490.

The previous prime is 18245528419. The next prime is 18245528591. The reversal of 18245528491 is 19482554281.

It is a happy number.

Together with previous prime (18245528419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18245528491 - 2¹¹ = 18245526443 is a prime.

It is not a weakly prime, because it can be changed into another prime (18245528291) 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, 9122764245 + 9122764246.

It is an arithmetic number, because the mean of its divisors is an integer number (9122764246).

Almost surely, 2^18245528491 is an apocalyptic number.

18245528491 is a deficient number, since it is larger than the sum of its proper divisors (1).

18245528491 is an equidigital number, since it uses as much as digits as its factorization.

18245528491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 921600, while the sum is 49.

The spelling of 18245528491 in words is "eighteen billion, two hundred forty-five million, five hundred twenty-eight thousand, four hundred ninety-one".