18100224 has 78 divisors (see below), whose sum is σ = 52389636. Its totient is φ = 6021120.

The previous prime is 18100211. The next prime is 18100231. The reversal of 18100224 is 42200181.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 18100197 and 18100206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36619 + ... + 37109.

It is an arithmetic number, because the mean of its divisors is an integer number (671662).

Almost surely, 2^18100224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18100224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26194818).

18100224 is an abundant number, since it is smaller than the sum of its proper divisors (34289412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18100224 is an equidigital number, since it uses as much as digits as its factorization.

18100224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 18100224 is about 4254.4358027828. The cubic root of 18100224 is about 262.5596490297.

The spelling of 18100224 in words is "eighteen million, one hundred thousand, two hundred twenty-four".