18282920 has 64 divisors (see below), whose sum is σ = 42854400. Its totient is φ = 7015680.

The previous prime is 18282917. The next prime is 18282931. The reversal of 18282920 is 2928281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143897 + ... + 144023.

It is an arithmetic number, because the mean of its divisors is an integer number (669600).

Almost surely, 2^18282920 is an apocalyptic number.

18282920 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 18282920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21427200).

18282920 is an abundant number, since it is smaller than the sum of its proper divisors (24571480).

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

18282920 is a wasteful number, since it uses less digits than its factorization.

18282920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18282920 is about 4275.8531312476. The cubic root of 18282920 is about 263.4400820569.

The spelling of 18282920 in words is "eighteen million, two hundred eighty-two thousand, nine hundred twenty".