18071298987840 has 5600 divisors, whose sum is σ = 89253896371200. Its totient is φ = 3441286840320.

The previous prime is 18071298987779. The next prime is 18071298987887. The reversal of 18071298987840 is 4878989217081.

18071298987840 is a `hidden beast` number, since 1 + 80 + 71 + 298 + 98 + 78 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 799 ways as a sum of consecutive naturals, for example, 582945128625 + ... + 582945128655.

Almost surely, 2^{18071298987840} is an apocalyptic number.

18071298987840 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 18071298987840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44626948185600).

18071298987840 is an abundant number, since it is smaller than the sum of its proper divisors (71182597383360).

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

18071298987840 is a wasteful number, since it uses less digits than its factorization.

18071298987840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 72.

The spelling of 18071298987840 in words is "eighteen trillion, seventy-one billion, two hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred forty".