18224361 has 9 divisors (see below), whose sum is σ = 26342589. Its totient is φ = 12141036.

The previous prime is 18224359. The next prime is 18224417. The reversal of 18224361 is 16342281.

The square root of 18224361 is 4269.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 18224361 - 2¹ = 18224359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18224321) 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 8 ways as a sum of consecutive naturals, for example, 12096 + ... + 13518.

Almost surely, 2^18224361 is an apocalyptic number.

18224361 is the 4269-th square number.

18224361 is the 2135-th centered octagonal number.

It is an amenable number.

18224361 is a deficient number, since it is larger than the sum of its proper divisors (8118228).

18224361 is an frugal number, since it uses more digits than its factorization.

18224361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852 (or 1426 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The cubic root of 18224361 is about 263.1585207697.

Multiplying 18224361 by its product of digits (2304), we get a square (41988927744 = 204912²).

The spelling of 18224361 in words is "eighteen million, two hundred twenty-four thousand, three hundred sixty-one".