18554818828 has 144 divisors (see below), whose sum is σ = 42961255680. Its totient is φ = 6930935424.

The previous prime is 18554818823. The next prime is 18554818883. The reversal of 18554818828 is 82881845581.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18554818823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23576251 + ... + 23577037.

Almost surely, 2^18554818828 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 18554818828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21480627840).

18554818828 is an abundant number, since it is smaller than the sum of its proper divisors (24406436852).

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

18554818828 is a wasteful number, since it uses less digits than its factorization.

18554818828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1315 counting only the distinct ones).

The product of its digits is 6553600, while the sum is 58.

The spelling of 18554818828 in words is "eighteen billion, five hundred fifty-four million, eight hundred eighteen thousand, eight hundred twenty-eight".