18128033280 has 960 divisors, whose sum is σ = 78073003008. Its totient is φ = 3941498880.

The previous prime is 18128033243. The next prime is 18128033293. The reversal of 18128033280 is 8233082181.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 100154790 + ... + 100154970.

Almost surely, 2^18128033280 is an apocalyptic number.

18128033280 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 18128033280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39036501504).

18128033280 is an abundant number, since it is smaller than the sum of its proper divisors (59944969728).

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

18128033280 is an equidigital number, since it uses as much as digits as its factorization.

18128033280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 18128033280 in words is "eighteen billion, one hundred twenty-eight million, thirty-three thousand, two hundred eighty".