18450012224 has 56 divisors (see below), whose sum is σ = 41939065728. Its totient is φ = 7888803840.

The previous prime is 18450012221. The next prime is 18450012253. The reversal of 18450012224 is 42221005481.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (18450012221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146429 + ... + 241539.

It is an arithmetic number, because the mean of its divisors is an integer number (748911888).

Almost surely, 2^18450012224 is an apocalyptic number.

18450012224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18450012224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20969532864).

18450012224 is an abundant number, since it is smaller than the sum of its proper divisors (23489053504).

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

18450012224 is an equidigital number, since it uses as much as digits as its factorization.

18450012224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95563 (or 95553 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The spelling of 18450012224 in words is "eighteen billion, four hundred fifty million, twelve thousand, two hundred twenty-four".