20109901000 has 128 divisors (see below), whose sum is σ = 54284256000. Its totient is φ = 6830131200.

The previous prime is 20109900991. The next prime is 20109901039. The reversal of 20109901000 is 10990102.

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 31 ways as a sum of consecutive naturals, for example, 735576 + ... + 762424.

It is an arithmetic number, because the mean of its divisors is an integer number (424095750).

Almost surely, 2^20109901000 is an apocalyptic number.

20109901000 is a gapful number since it is divisible by the number (20) 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 20109901000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27142128000).

20109901000 is an abundant number, since it is smaller than the sum of its proper divisors (34174355000).

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

20109901000 is a wasteful number, since it uses less digits than its factorization.

20109901000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26984 (or 26970 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 20109901000 in words is "twenty billion, one hundred nine million, nine hundred one thousand".