18829987808 has 12 divisors (see below), whose sum is σ = 37071538560. Its totient is φ = 9414993888.

The previous prime is 18829987789. The next prime is 18829987811. The reversal of 18829987808 is 80878992881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 294218528 + ... + 294218591.

It is an arithmetic number, because the mean of its divisors is an integer number (3089294880).

Almost surely, 2^18829987808 is an apocalyptic number.

It is an amenable number.

18829987808 is a deficient number, since it is larger than the sum of its proper divisors (18241550752).

18829987808 is an equidigital number, since it uses as much as digits as its factorization.

18829987808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588437129 (or 588437121 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 68.

The spelling of 18829987808 in words is "eighteen billion, eight hundred twenty-nine million, nine hundred eighty-seven thousand, eight hundred eight".