18244327603 has 2 divisors, whose sum is σ = 18244327604. Its totient is φ = 18244327602.

The previous prime is 18244327589. The next prime is 18244327643. The reversal of 18244327603 is 30672344281.

It is a happy number.

It is an a-pointer prime, because the next prime (18244327643) can be obtained adding 18244327603 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18244327603 - 2⁵ = 18244327571 is a prime.

It is not a weakly prime, because it can be changed into another prime (18244327643) 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, 9122163801 + 9122163802.

It is an arithmetic number, because the mean of its divisors is an integer number (9122163802).

Almost surely, 2^18244327603 is an apocalyptic number.

18244327603 is a deficient number, since it is larger than the sum of its proper divisors (1).

18244327603 is an equidigital number, since it uses as much as digits as its factorization.

18244327603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 18244327603 in words is "eighteen billion, two hundred forty-four million, three hundred twenty-seven thousand, six hundred three".