18009552 has 80 divisors (see below), whose sum is σ = 52996608. Its totient is φ = 5216640.

The previous prime is 18009547. The next prime is 18009553. The reversal of 18009552 is 25590081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009553) 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 15 ways as a sum of consecutive naturals, for example, 11403 + ... + 12885.

Almost surely, 2^18009552 is an apocalyptic number.

18009552 is a gapful number since it is divisible by the number (12) 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 18009552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26498304).

18009552 is an abundant number, since it is smaller than the sum of its proper divisors (34987056).

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

18009552 is a wasteful number, since it uses less digits than its factorization.

18009552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1522 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 18009552 is about 4243.7662518098. The cubic root of 18009552 is about 262.1204892264.

The spelling of 18009552 in words is "eighteen million, nine thousand, five hundred fifty-two".