18065555000 has 80 divisors (see below), whose sum is σ = 42652253160. Its totient is φ = 7170800000.

The previous prime is 18065554967. The next prime is 18065555003. The reversal of 18065555000 is 55556081.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18065555003) 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 19 ways as a sum of consecutive naturals, for example, 641210 + ... + 668790.

Almost surely, 2^18065555000 is an apocalyptic number.

18065555000 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 18065555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21326126580).

18065555000 is an abundant number, since it is smaller than the sum of its proper divisors (24586698160).

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

18065555000 is a wasteful number, since it uses less digits than its factorization.

18065555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27738 (or 27719 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 18065555000 in words is "eighteen billion, sixty-five million, five hundred fifty-five thousand".