18224565 has 8 divisors (see below), whose sum is σ = 29159328. Its totient is φ = 9719760.

The previous prime is 18224551. The next prime is 18224567. The reversal of 18224565 is 56542281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18224565 - 2⁹ = 18224053 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18224567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607471 + ... + 607500.

It is an arithmetic number, because the mean of its divisors is an integer number (3644916).

Almost surely, 2^18224565 is an apocalyptic number.

18224565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18224565 is a deficient number, since it is larger than the sum of its proper divisors (10934763).

18224565 is a wasteful number, since it uses less digits than its factorization.

18224565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214979.

The product of its digits is 19200, while the sum is 33.

The square root of 18224565 is about 4269.0238931166. The cubic root of 18224565 is about 263.1595026814.

The spelling of 18224565 in words is "eighteen million, two hundred twenty-four thousand, five hundred sixty-five".