18533130 has 128 divisors (see below), whose sum is σ = 56733696. Its totient is φ = 3763200.

The previous prime is 18533089. The next prime is 18533143. The reversal of 18533130 is 3133581.

It is a self number, because there is not a number n which added to its sum of digits gives 18533130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 163954 + ... + 164066.

It is an arithmetic number, because the mean of its divisors is an integer number (443232).

Almost surely, 2^18533130 is an apocalyptic number.

18533130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18533130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28366848).

18533130 is an abundant number, since it is smaller than the sum of its proper divisors (38200566).

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

18533130 is a wasteful number, since it uses less digits than its factorization.

18533130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 18533130 is about 4305.0121951047. The cubic root of 18533130 is about 264.6364065452.

The spelling of 18533130 in words is "eighteen million, five hundred thirty-three thousand, one hundred thirty".