18224899 has 12 divisors (see below), whose sum is σ = 22895152. Its totient is φ = 14200560.

The previous prime is 18224897. The next prime is 18224929. The reversal of 18224899 is 99842281.

It is not a de Polignac number, because 18224899 - 2¹ = 18224897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18224897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9912 + ... + 11605.

Almost surely, 2^18224899 is an apocalyptic number.

18224899 is a deficient number, since it is larger than the sum of its proper divisors (4670253).

18224899 is a wasteful number, since it uses less digits than its factorization.

18224899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21546 (or 21535 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 18224899 is about 4269.0630119500. The cubic root of 18224899 is about 263.1611103053.

The spelling of 18224899 in words is "eighteen million, two hundred twenty-four thousand, eight hundred ninety-nine".