18885305803 has 24 divisors (see below), whose sum is σ = 24017540064. Its totient is φ = 14460145920.

The previous prime is 18885305801. The next prime is 18885305807. The reversal of 18885305803 is 30850358881.

It is not a de Polignac number, because 18885305803 - 2¹ = 18885305801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18885305801) 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 23 ways as a sum of consecutive naturals, for example, 20526 + ... + 195427.

It is an arithmetic number, because the mean of its divisors is an integer number (1000730836).

Almost surely, 2^18885305803 is an apocalyptic number.

18885305803 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18885305803 is a deficient number, since it is larger than the sum of its proper divisors (5132234261).

18885305803 is a wasteful number, since it uses less digits than its factorization.

18885305803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216035 (or 216004 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 18885305803 in words is "eighteen billion, eight hundred eighty-five million, three hundred five thousand, eight hundred three".