18133280 has 48 divisors (see below), whose sum is σ = 46738944. Its totient is φ = 6593280.

The previous prime is 18133279. The next prime is 18133309. The reversal of 18133280 is 8233181.

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, 3392 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (973728).

Almost surely, 2^18133280 is an apocalyptic number.

18133280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18133280 is an abundant number, since it is smaller than the sum of its proper divisors (28605664).

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

18133280 is a wasteful number, since it uses less digits than its factorization.

18133280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10329 (or 10321 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18133280 is about 4258.3189171315. The cubic root of 18133280 is about 262.7193872663.

Subtracting from 18133280 its reverse (8233181), we obtain a palindrome (9900099).

The spelling of 18133280 in words is "eighteen million, one hundred thirty-three thousand, two hundred eighty".