18979243488 has 480 divisors, whose sum is σ = 61856071200. Its totient is φ = 5685313536.

The previous prime is 18979243421. The next prime is 18979243489. The reversal of 18979243488 is 88434297981.

18979243488 is a `hidden beast` number, since 1 + 89 + 79 + 2 + 4 + 3 + 488 = 666.

It is a super-2 number, since 2×18979243488² (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 (18979243489) 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 79 ways as a sum of consecutive naturals, for example, 138534556 + ... + 138534692.

It is an arithmetic number, because the mean of its divisors is an integer number (128866815).

Almost surely, 2^18979243488 is an apocalyptic number.

18979243488 is a gapful number since it is divisible by the number (18) 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 18979243488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30928035600).

18979243488 is an abundant number, since it is smaller than the sum of its proper divisors (42876827712).

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

18979243488 is a wasteful number, since it uses less digits than its factorization.

18979243488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 287 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 18979243488 in words is "eighteen billion, nine hundred seventy-nine million, two hundred forty-three thousand, four hundred eighty-eight".