18385201887 has 8 divisors (see below), whose sum is σ = 26399264304. Its totient is φ = 11313970368.

The previous prime is 18385201847. The next prime is 18385201921. The reversal of 18385201887 is 78810258381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18385201887 - 2⁷ = 18385201759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385201817) 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 7 ways as a sum of consecutive naturals, for example, 235707678 + ... + 235707755.

It is an arithmetic number, because the mean of its divisors is an integer number (3299908038).

Almost surely, 2^18385201887 is an apocalyptic number.

18385201887 is a deficient number, since it is larger than the sum of its proper divisors (8014062417).

18385201887 is a wasteful number, since it uses less digits than its factorization.

18385201887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471415449.

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 18385201887 in words is "eighteen billion, three hundred eighty-five million, two hundred one thousand, eight hundred eighty-seven".