18065871685500 has 192 divisors, whose sum is σ = 53769580195968. Its totient is φ = 4711751116800.

The previous prime is 18065871685483. The next prime is 18065871685523. The reversal of 18065871685500 is 558617856081.

It is a super-2 number, since 2×18065871685500² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24843072 + ... + 25559928.

It is an arithmetic number, because the mean of its divisors is an integer number (280049896854).

Almost surely, 2^{18065871685500} is an apocalyptic number.

18065871685500 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 18065871685500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26884790097984).

18065871685500 is an abundant number, since it is smaller than the sum of its proper divisors (35703708510468).

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

18065871685500 is a wasteful number, since it uses less digits than its factorization.

18065871685500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717249 (or 717237 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 60.

The spelling of 18065871685500 in words is "eighteen trillion, sixty-five billion, eight hundred seventy-one million, six hundred eighty-five thousand, five hundred".