18555141387 has 16 divisors (see below), whose sum is σ = 25084750880. Its totient is φ = 12197889792.

The previous prime is 18555141361. The next prime is 18555141389. The reversal of 18555141387 is 78314155581.

It is a happy number.

It is not a de Polignac number, because 18555141387 - 2⁶ = 18555141323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18555141389) 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 in 15 ways as a sum of consecutive naturals, for example, 1526289 + ... + 1538397.

It is an arithmetic number, because the mean of its divisors is an integer number (1567796930).

Almost surely, 2^18555141387 is an apocalyptic number.

18555141387 is a deficient number, since it is larger than the sum of its proper divisors (6529609493).

18555141387 is a wasteful number, since it uses less digits than its factorization.

18555141387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19182.

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

The spelling of 18555141387 in words is "eighteen billion, five hundred fifty-five million, one hundred forty-one thousand, three hundred eighty-seven".