18227824 has 10 divisors (see below), whose sum is σ = 35316440. Its totient is φ = 9113904.

The previous prime is 18227809. The next prime is 18227831. The reversal of 18227824 is 42872281.

It is a self number, because there is not a number n which added to its sum of digits gives 18227824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569604 + ... + 569635.

It is an arithmetic number, because the mean of its divisors is an integer number (3531644).

Almost surely, 2^18227824 is an apocalyptic number.

It is an amenable number.

18227824 is a deficient number, since it is larger than the sum of its proper divisors (17088616).

18227824 is a wasteful number, since it uses less digits than its factorization.

18227824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139247 (or 1139241 counting only the distinct ones).

The product of its digits is 14336, while the sum is 34.

The square root of 18227824 is about 4269.4055792347. The cubic root of 18227824 is about 263.1751882081.

The spelling of 18227824 in words is "eighteen million, two hundred twenty-seven thousand, eight hundred twenty-four".