18243552 has 48 divisors (see below), whose sum is σ = 49548240. Its totient is φ = 5870592.

The previous prime is 18243541. The next prime is 18243559. The reversal of 18243552 is 25534281.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18243559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 493 + ... + 6060.

It is an arithmetic number, because the mean of its divisors is an integer number (1032255).

Almost surely, 2^18243552 is an apocalyptic number.

18243552 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 18243552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24774120).

18243552 is an abundant number, since it is smaller than the sum of its proper divisors (31304688).

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

18243552 is a wasteful number, since it uses less digits than its factorization.

18243552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6595 (or 6587 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 18243552 is about 4271.2471246698. The cubic root of 18243552 is about 263.2508606053.

It can be divided in two parts, 182 and 43552, that added together give a palindrome (43734).

The spelling of 18243552 in words is "eighteen million, two hundred forty-three thousand, five hundred fifty-two".