18887053336887 has 32 divisors (see below), whose sum is σ = 25823968998912. Its totient is φ = 12274674407424.

The previous prime is 18887053336849. The next prime is 18887053336909. The reversal of 18887053336887 is 78863335078881.

It is not a de Polignac number, because 18887053336887 - 2¹⁰ = 18887053335863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18887053336387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364821478 + ... + 364873244.

It is an arithmetic number, because the mean of its divisors is an integer number (806999031216).

Almost surely, 2^{18887053336887} is an apocalyptic number.

18887053336887 is a deficient number, since it is larger than the sum of its proper divisors (6936915662025).

18887053336887 is a wasteful number, since it uses less digits than its factorization.

18887053336887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70647.

The product of its (nonzero) digits is 1300561920, while the sum is 75.

The spelling of 18887053336887 in words is "eighteen trillion, eight hundred eighty-seven billion, fifty-three million, three hundred thirty-six thousand, eight hundred eighty-seven".