18380655000 has 320 divisors, whose sum is σ = 67562748000. Its totient is φ = 4612608000.

The previous prime is 18380654989. The next prime is 18380655031. The reversal of 18380655000 is 55608381.

18380655000 is a `hidden beast` number, since 18 + 3 + 80 + 65 + 500 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2290996 + ... + 2299004.

Almost surely, 2^18380655000 is an apocalyptic number.

18380655000 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 18380655000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33781374000).

18380655000 is an abundant number, since it is smaller than the sum of its proper divisors (49182093000).

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

18380655000 is a wasteful number, since it uses less digits than its factorization.

18380655000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061 (or 8036 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

It can be divided in two parts, 18380 and 655000, that added together give a triangular number (673380 = T₁₁₆₀).

The spelling of 18380655000 in words is "eighteen billion, three hundred eighty million, six hundred fifty-five thousand".