18699129988 has 96 divisors (see below), whose sum is σ = 41704685568. Its totient is φ = 7125148800.

The previous prime is 18699129979. The next prime is 18699129997. The reversal of 18699129988 is 88992199681.

It is an interprime number because it is at equal distance from previous prime (18699129979) and next prime (18699129997).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2773870 + ... + 2780602.

It is an arithmetic number, because the mean of its divisors is an integer number (434423808).

Almost surely, 2^18699129988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18699129988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20852342784).

18699129988 is an abundant number, since it is smaller than the sum of its proper divisors (23005555580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18699129988 is a wasteful number, since it uses less digits than its factorization.

18699129988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6953 (or 6951 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 70.

The spelling of 18699129988 in words is "eighteen billion, six hundred ninety-nine million, one hundred twenty-nine thousand, nine hundred eighty-eight".