18484394441436 has 144 divisors (see below), whose sum is σ = 58273941293568. Its totient is φ = 4799485468800.

The previous prime is 18484394441431. The next prime is 18484394441459. The reversal of 18484394441436 is 63414449348481.

18484394441436 is a `hidden beast` number, since 1 + 8 + 4 + 8 + 43 + 9 + 444 + 143 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18484394441431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6898606 + ... + 9195626.

It is an arithmetic number, because the mean of its divisors is an integer number (404680147872).

Almost surely, 2^{18484394441436} 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 18484394441436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29136970646784).

18484394441436 is an abundant number, since it is smaller than the sum of its proper divisors (39789546852132).

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

18484394441436 is a wasteful number, since it uses less digits than its factorization.

18484394441436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299952 (or 2299947 counting only the distinct ones).

The product of its digits is 127401984, while the sum is 63.

The spelling of 18484394441436 in words is "eighteen trillion, four hundred eighty-four billion, three hundred ninety-four million, four hundred forty-one thousand, four hundred thirty-six".