18143558240 has 24 divisors (see below), whose sum is σ = 42864156720. Its totient is φ = 7257423232.

The previous prime is 18143558233. The next prime is 18143558249. The reversal of 18143558240 is 4285534181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143558249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56698460 + ... + 56698779.

It is an arithmetic number, because the mean of its divisors is an integer number (1786006530).

Almost surely, 2^18143558240 is an apocalyptic number.

18143558240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18143558240 is an abundant number, since it is smaller than the sum of its proper divisors (24720598480).

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

18143558240 is a wasteful number, since it uses less digits than its factorization.

18143558240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113397254 (or 113397246 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 18143558240 in words is "eighteen billion, one hundred forty-three million, five hundred fifty-eight thousand, two hundred forty".