18735499999 has 2 divisors, whose sum is σ = 18735500000. Its totient is φ = 18735499998.

The previous prime is 18735499921. The next prime is 18735500027. The reversal of 18735499999 is 99999453781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18735499999 - 2¹³ = 18735491807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18735499799) 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, 9367749999 + 9367750000.

It is an arithmetic number, because the mean of its divisors is an integer number (9367750000).

Almost surely, 2^18735499999 is an apocalyptic number.

18735499999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18735499999 is an equidigital number, since it uses as much as digits as its factorization.

18735499999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198404640, while the sum is 73.

The spelling of 18735499999 in words is "eighteen billion, seven hundred thirty-five million, four hundred ninety-nine thousand, nine hundred ninety-nine".