18441284056 has 128 divisors (see below), whose sum is σ = 38852452800. Its totient is φ = 8200258560.

The previous prime is 18441284051. The next prime is 18441284131. The reversal of 18441284056 is 65048214481.

It is a super-2 number, since 2×18441284056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18441284051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113136631 + ... + 113136793.

Almost surely, 2^18441284056 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 18441284056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19426226400).

18441284056 is an abundant number, since it is smaller than the sum of its proper divisors (20411168744).

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

18441284056 is a wasteful number, since it uses less digits than its factorization.

18441284056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The spelling of 18441284056 in words is "eighteen billion, four hundred forty-one million, two hundred eighty-four thousand, fifty-six".