18808240535856 has 480 divisors, whose sum is σ = 57704278921920. Its totient is φ = 5864108285952.

The previous prime is 18808240535827. The next prime is 18808240535869. The reversal of 18808240535856 is 65853504280881.

It is a happy number.

18808240535856 is a `hidden beast` number, since 1 + 8 + 8 + 0 + 8 + 2 + 40 + 5 + 3 + 585 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18808240535793 and 18808240535802.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4881451626 + ... + 4881455478.

It is an arithmetic number, because the mean of its divisors is an integer number (120217247754).

Almost surely, 2^{18808240535856} is an apocalyptic number.

18808240535856 is a gapful number since it is divisible by the number (16) 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 18808240535856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28852139460960).

18808240535856 is an abundant number, since it is smaller than the sum of its proper divisors (38896038386064).

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

18808240535856 is a wasteful number, since it uses less digits than its factorization.

18808240535856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298 (or 4267 counting only the distinct ones).

The product of its (nonzero) digits is 73728000, while the sum is 63.

The spelling of 18808240535856 in words is "eighteen trillion, eight hundred eight billion, two hundred forty million, five hundred thirty-five thousand, eight hundred fifty-six".