18984805632 has 162 divisors, whose sum is σ = 59273589102. Its totient is φ = 5841358848.

The previous prime is 18984805627. The next prime is 18984805633. The reversal of 18984805632 is 23650848981.

18984805632 is a `hidden beast` number, since 1 + 89 + 8 + 480 + 56 + 32 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 571401216 + 18413404416 = 23904^2 + 135696^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18984805633) 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 17 ways as a sum of consecutive naturals, for example, 364998 + ... + 413754.

Almost surely, 2^18984805632 is an apocalyptic number.

18984805632 is a gapful number since it is divisible by the number (12) 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 18984805632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29636794551).

18984805632 is an abundant number, since it is smaller than the sum of its proper divisors (40288783470).

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

18984805632 is a wasteful number, since it uses less digits than its factorization.

18984805632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48805 (or 48775 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 18984805632 in words is "eighteen billion, nine hundred eighty-four million, eight hundred five thousand, six hundred thirty-two".