18306224 has 10 divisors (see below), whose sum is σ = 35468340. Its totient is φ = 9153104.

The previous prime is 18306217. The next prime is 18306247. The reversal of 18306224 is 42260381.

It is a junction number, because it is equal to n+sod(n) for n = 18306193 and 18306202.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 572054 + ... + 572085.

It is an arithmetic number, because the mean of its divisors is an integer number (3546834).

Almost surely, 2^18306224 is an apocalyptic number.

It is an amenable number.

18306224 is a deficient number, since it is larger than the sum of its proper divisors (17162116).

18306224 is a wasteful number, since it uses less digits than its factorization.

18306224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144147 (or 1144141 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18306224 is about 4278.5773336472. The cubic root of 18306224 is about 263.5519642783.

The spelling of 18306224 in words is "eighteen million, three hundred six thousand, two hundred twenty-four".