20109990336 has 224 divisors, whose sum is σ = 59931970560. Its totient is φ = 5913575424.

The previous prime is 20109990301. The next prime is 20109990337. The reversal of 20109990336 is 63309990102.

It is a happy number.

It is a super-2 number, since 2×20109990336² (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 (20109990337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6013881 + ... + 6017223.

It is an arithmetic number, because the mean of its divisors is an integer number (267553440).

Almost surely, 2^20109990336 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 20109990336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29965985280).

20109990336 is an abundant number, since it is smaller than the sum of its proper divisors (39821980224).

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

20109990336 is a wasteful number, since it uses less digits than its factorization.

20109990336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491 (or 3481 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 42.

The spelling of 20109990336 in words is "twenty billion, one hundred nine million, nine hundred ninety thousand, three hundred thirty-six".