18105044480 has 80 divisors (see below), whose sum is σ = 43670642400. Its totient is φ = 7198482432.

The previous prime is 18105044467. The next prime is 18105044543. The reversal of 18105044480 is 8444050181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×18105044480³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18105044480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406346 + ... + 448694.

It is an arithmetic number, because the mean of its divisors is an integer number (545883030).

Almost surely, 2^18105044480 is an apocalyptic number.

18105044480 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 18105044480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21835321200).

18105044480 is an abundant number, since it is smaller than the sum of its proper divisors (25565597920).

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

18105044480 is an equidigital number, since it uses as much as digits as its factorization.

18105044480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42539 (or 42523 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The spelling of 18105044480 in words is "eighteen billion, one hundred five million, forty-four thousand, four hundred eighty".