18047533499 has 2 divisors, whose sum is σ = 18047533500. Its totient is φ = 18047533498.

The previous prime is 18047533481. The next prime is 18047533507. The reversal of 18047533499 is 99433574081.

It is a strong prime.

It is an emirp because it is prime and its reverse (99433574081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18047533499 - 2²⁰ = 18046484923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18047533499.

It is not a weakly prime, because it can be changed into another prime (18047533799) 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, 9023766749 + 9023766750.

It is an arithmetic number, because the mean of its divisors is an integer number (9023766750).

Almost surely, 2^18047533499 is an apocalyptic number.

18047533499 is a deficient number, since it is larger than the sum of its proper divisors (1).

18047533499 is an equidigital number, since it uses as much as digits as its factorization.

18047533499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 18047533499 in words is "eighteen billion, forty-seven million, five hundred thirty-three thousand, four hundred ninety-nine".