18198059235840 has 1280 divisors, whose sum is σ = 74509702502400. Its totient is φ = 4163656089600.

The previous prime is 18198059235823. The next prime is 18198059235899. The reversal of 18198059235840 is 4853295089181.

18198059235840 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 8 + 0 + 592 + 35 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a super-2 number, since 2×18198059235840² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4059346239 + ... + 4059350721.

It is an arithmetic number, because the mean of its divisors is an integer number (58210705080).

Almost surely, 2^{18198059235840} is an apocalyptic number.

18198059235840 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 18198059235840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37254851251200).

18198059235840 is an abundant number, since it is smaller than the sum of its proper divisors (56311643266560).

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

18198059235840 is a wasteful number, since it uses less digits than its factorization.

18198059235840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4804 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 18198059235840 in words is "eighteen trillion, one hundred ninety-eight billion, fifty-nine million, two hundred thirty-five thousand, eight hundred forty".