18973108899 has 32 divisors (see below), whose sum is σ = 28881751040. Its totient is φ = 12301017696.

The previous prime is 18973108897. The next prime is 18973108919. The reversal of 18973108899 is 99880137981.

It is not a de Polignac number, because 18973108899 - 2¹ = 18973108897 is a prime.

It is a super-3 number, since 3×18973108899³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18973108897) 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 31 ways as a sum of consecutive naturals, for example, 3300822 + ... + 3306564.

It is an arithmetic number, because the mean of its divisors is an integer number (902554720).

Almost surely, 2^18973108899 is an apocalyptic number.

18973108899 is a deficient number, since it is larger than the sum of its proper divisors (9908642141).

18973108899 is a wasteful number, since it uses less digits than its factorization.

18973108899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9096 (or 9090 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 63.

The spelling of 18973108899 in words is "eighteen billion, nine hundred seventy-three million, one hundred eight thousand, eight hundred ninety-nine".