18377485499 has 2 divisors, whose sum is σ = 18377485500. Its totient is φ = 18377485498.

The previous prime is 18377485457. The next prime is 18377485517. The reversal of 18377485499 is 99458477381.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18377485499 is a prime.

It is not a weakly prime, because it can be changed into another prime (18377985499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9188742749 + 9188742750.

It is an arithmetic number, because the mean of its divisors is an integer number (9188742750).

Almost surely, 2^18377485499 is an apocalyptic number.

18377485499 is a deficient number, since it is larger than the sum of its proper divisors (1).

18377485499 is an equidigital number, since it uses as much as digits as its factorization.

18377485499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 65.

The spelling of 18377485499 in words is "eighteen billion, three hundred seventy-seven million, four hundred eighty-five thousand, four hundred ninety-nine".