20109812184 has 192 divisors, whose sum is σ = 69560225280. Its totient is φ = 5095872000.

The previous prime is 20109812137. The next prime is 20109812221. The reversal of 20109812184 is 48121890102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183069 + ... + 271539.

It is an arithmetic number, because the mean of its divisors is an integer number (362292840).

Almost surely, 2^20109812184 is an apocalyptic number.

20109812184 is a gapful number since it is divisible by the number (24) 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 20109812184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34780112640).

20109812184 is an abundant number, since it is smaller than the sum of its proper divisors (49450413096).

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

20109812184 is a wasteful number, since it uses less digits than its factorization.

20109812184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88542 (or 88535 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 20109812184 in words is "twenty billion, one hundred nine million, eight hundred twelve thousand, one hundred eighty-four".