18134545280 has 64 divisors (see below), whose sum is σ = 43430763600. Its totient is φ = 7240790016.

The previous prime is 18134545279. The next prime is 18134545327. The reversal of 18134545280 is 8254543181.

It is a tau number, because it is divible by the number of its divisors (64).

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, 335156 + ... + 385484.

Almost surely, 2^18134545280 is an apocalyptic number.

18134545280 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 18134545280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21715381800).

18134545280 is an abundant number, since it is smaller than the sum of its proper divisors (25296218320).

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

18134545280 is an equidigital number, since it uses as much as digits as its factorization.

18134545280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50911 (or 50899 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 18134545280 in words is "eighteen billion, one hundred thirty-four million, five hundred forty-five thousand, two hundred eighty".