18018880 has 56 divisors (see below), whose sum is σ = 46817280. Its totient is φ = 6551040.

The previous prime is 18018841. The next prime is 18018883. The reversal of 18018880 is 8881081.

It is not an unprimeable number, because it can be changed into a prime (18018883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961 + ... + 6079.

Almost surely, 2^18018880 is an apocalyptic number.

18018880 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 18018880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23408640).

18018880 is an abundant number, since it is smaller than the sum of its proper divisors (28798400).

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

18018880 is a wasteful number, since it uses less digits than its factorization.

18018880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147 (or 5137 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 34.

The square root of 18018880 is about 4244.8651333111. The cubic root of 18018880 is about 262.1657362877.

The spelling of 18018880 in words is "eighteen million, eighteen thousand, eight hundred eighty".