18105336861136 has 80 divisors (see below), whose sum is σ = 40408699392000. Its totient is φ = 7697829565440.

The previous prime is 18105336861097. The next prime is 18105336861217. The reversal of 18105336861136 is 63116863350181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287990346 + ... + 288053206.

It is an arithmetic number, because the mean of its divisors is an integer number (505108742400).

Almost surely, 2^{18105336861136} is an apocalyptic number.

18105336861136 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 18105336861136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20204349696000).

18105336861136 is an abundant number, since it is smaller than the sum of its proper divisors (22303362530864).

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

18105336861136 is a wasteful number, since it uses less digits than its factorization.

18105336861136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83252 (or 83246 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 18105336861136 in words is "eighteen trillion, one hundred five billion, three hundred thirty-six million, eight hundred sixty-one thousand, one hundred thirty-six".