18996041489 has 2 divisors, whose sum is σ = 18996041490. Its totient is φ = 18996041488.

The previous prime is 18996041473. The next prime is 18996041539. The reversal of 18996041489 is 98414069981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13463657089 + 5532384400 = 116033^2 + 74380^2 .

It is an emirp because it is prime and its reverse (98414069981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18996041489 - 2⁴ = 18996041473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18996041429) 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, 9498020744 + 9498020745.

It is an arithmetic number, because the mean of its divisors is an integer number (9498020745).

Almost surely, 2^18996041489 is an apocalyptic number.

It is an amenable number.

18996041489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18996041489 is an equidigital number, since it uses as much as digits as its factorization.

18996041489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 18996041489 in words is "eighteen billion, nine hundred ninety-six million, forty-one thousand, four hundred eighty-nine".