18685485000 has 960 divisors, whose sum is σ = 81191510400. Its totient is φ = 3942432000.

The previous prime is 18685484989. The next prime is 18685485029. The reversal of 18685485000 is 58458681.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1437344994 + ... + 1437345006.

It is an arithmetic number, because the mean of its divisors is an integer number (84574490).

Almost surely, 2^18685485000 is an apocalyptic number.

18685485000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18685485000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40595755200).

18685485000 is an abundant number, since it is smaller than the sum of its proper divisors (62506025400).

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

18685485000 is an frugal number, since it uses more digits than its factorization.

18685485000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 18685485000 in words is "eighteen billion, six hundred eighty-five million, four hundred eighty-five thousand".