18687333457099 has 2 divisors, whose sum is σ = 18687333457100. Its totient is φ = 18687333457098.

The previous prime is 18687333457031. The next prime is 18687333457103. The reversal of 18687333457099 is 99075433378681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18687333457099 - 2²³ = 18687325068491 is a prime.

It is not a weakly prime, because it can be changed into another prime (18687333157099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9343666728549 + 9343666728550.

It is an arithmetic number, because the mean of its divisors is an integer number (9343666728550).

Almost surely, 2^{18687333457099} is an apocalyptic number.

18687333457099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18687333457099 is an equidigital number, since it uses as much as digits as its factorization.

18687333457099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 823011840, while the sum is 73.

The spelling of 18687333457099 in words is "eighteen trillion, six hundred eighty-seven billion, three hundred thirty-three million, four hundred fifty-seven thousand, ninety-nine".