20110000000 has 128 divisors (see below), whose sum is σ = 50103387360. Its totient is φ = 8040000000.

The previous prime is 20109999989. The next prime is 20110000003. The reversal of 20110000000 is 1102.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110000003) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9998995 + ... + 10001005.

Almost surely, 2^20110000000 is an apocalyptic number.

20110000000 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 20110000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25051693680).

20110000000 is an abundant number, since it is smaller than the sum of its proper divisors (29993387360).

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

20110000000 is an frugal number, since it uses more digits than its factorization.

20110000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

Adding to 20110000000 its reverse (1102), we get a palindrome (20110001102).

The spelling of 20110000000 in words is "twenty billion, one hundred ten million", and thus it is an aban number.