18768205155 has 96 divisors (see below), whose sum is σ = 35674331904. Its totient is φ = 8399026944.

The previous prime is 18768205151. The next prime is 18768205177. The reversal of 18768205155 is 55150286781.

It is not a de Polignac number, because 18768205155 - 2² = 18768205151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18768205151) 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 in 95 ways as a sum of consecutive naturals, for example, 8518284 + ... + 8520486.

It is an arithmetic number, because the mean of its divisors is an integer number (371607624).

Almost surely, 2^18768205155 is an apocalyptic number.

18768205155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18768205155 is a deficient number, since it is larger than the sum of its proper divisors (16906126749).

18768205155 is a wasteful number, since it uses less digits than its factorization.

18768205155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 48.

The spelling of 18768205155 in words is "eighteen billion, seven hundred sixty-eight million, two hundred five thousand, one hundred fifty-five".