18442507128 has 64 divisors (see below), whose sum is σ = 48190256640. Its totient is φ = 5870519424.

The previous prime is 18442507099. The next prime is 18442507129. The reversal of 18442507128 is 82170524481.

It is a self number, because there is not a number n which added to its sum of digits gives 18442507128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442507129) 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, 311125 + ... + 365627.

It is an arithmetic number, because the mean of its divisors is an integer number (752972760).

Almost surely, 2^18442507128 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 18442507128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24095128320).

18442507128 is an abundant number, since it is smaller than the sum of its proper divisors (29747749512).

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

18442507128 is a wasteful number, since it uses less digits than its factorization.

18442507128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55148 (or 55144 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 18442507128 in words is "eighteen billion, four hundred forty-two million, five hundred seven thousand, one hundred twenty-eight".