18224481 has 16 divisors (see below), whose sum is σ = 26619840. Its totient is φ = 10998720.

The previous prime is 18224449. The next prime is 18224491. The reversal of 18224481 is 18442281.

It is not a de Polignac number, because 18224481 - 2⁵ = 18224449 is a prime.

It is a super-2 number, since 2×18224481² = 664263415438722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18224491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7851 + ... + 9903.

It is an arithmetic number, because the mean of its divisors is an integer number (1663740).

Almost surely, 2^18224481 is an apocalyptic number.

18224481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18224481 is a deficient number, since it is larger than the sum of its proper divisors (8395359).

18224481 is a wasteful number, since it uses less digits than its factorization.

18224481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its digits is 4096, while the sum is 30.

The square root of 18224481 is about 4269.0140547906. The cubic root of 18224481 is about 263.1590983657.

The spelling of 18224481 in words is "eighteen million, two hundred twenty-four thousand, four hundred eighty-one".