18540036000 has 768 divisors, whose sum is σ = 71327692800. Its totient is φ = 4672512000.

The previous prime is 18540035981. The next prime is 18540036077. The reversal of 18540036000 is 63004581.

18540036000 is a `hidden beast` number, since 1 + 8 + 54 + 0 + 0 + 3 + 600 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 234683961 + ... + 234684039.

It is an arithmetic number, because the mean of its divisors is an integer number (92874600).

Almost surely, 2^18540036000 is an apocalyptic number.

18540036000 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 18540036000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35663846400).

18540036000 is an abundant number, since it is smaller than the sum of its proper divisors (52787656800).

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

18540036000 is a wasteful number, since it uses less digits than its factorization.

18540036000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 18540036000 in words is "eighteen billion, five hundred forty million, thirty-six thousand".