18537540000 has 960 divisors, whose sum is σ = 77087324160. Its totient is φ = 3801600000.

The previous prime is 18537539989. The next prime is 18537540017. The reversal of 18537540000 is 4573581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 183539950 + ... + 183540050.

It is an arithmetic number, because the mean of its divisors is an integer number (80299296).

Almost surely, 2^18537540000 is an apocalyptic number.

18537540000 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 18537540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38543662080).

18537540000 is an abundant number, since it is smaller than the sum of its proper divisors (58549784160).

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

18537540000 is a wasteful number, since it uses less digits than its factorization.

18537540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 18537540000 in words is "eighteen billion, five hundred thirty-seven million, five hundred forty thousand".