18130552 has 32 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 8188000.

The previous prime is 18130543. The next prime is 18130559. The reversal of 18130552 is 25503181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15177 + ... + 16327.

It is an arithmetic number, because the mean of its divisors is an integer number (1166400).

Almost surely, 2^18130552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18130552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18662400).

18130552 is an abundant number, since it is smaller than the sum of its proper divisors (19194248).

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

18130552 is a wasteful number, since it uses less digits than its factorization.

18130552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 18130552 is about 4257.9985908875. The cubic root of 18130552 is about 262.7062119623.

The spelling of 18130552 in words is "eighteen million, one hundred thirty thousand, five hundred fifty-two".