18543258240 has 512 divisors, whose sum is σ = 68208134400. Its totient is φ = 4246732800.

The previous prime is 18543258229. The next prime is 18543258247. The reversal of 18543258240 is 4285234581.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18543258192 and 18543258201.

It is not an unprimeable number, because it can be changed into a prime (18543258247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28928320 + ... + 28928960.

Almost surely, 2^18543258240 is an apocalyptic number.

18543258240 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 18543258240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34104067200).

18543258240 is an abundant number, since it is smaller than the sum of its proper divisors (49664876160).

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

18543258240 is a wasteful number, since it uses less digits than its factorization.

18543258240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The spelling of 18543258240 in words is "eighteen billion, five hundred forty-three million, two hundred fifty-eight thousand, two hundred forty".