20200111100 has 144 divisors (see below), whose sum is σ = 49753690560. Its totient is φ = 7062528000.

The previous prime is 20200111081. The next prime is 20200111103. The reversal of 20200111100 is 111100202.

20200111100 is a modest number, since divided by 111100 gives 20200 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200111103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3016556 + ... + 3023244.

It is an arithmetic number, because the mean of its divisors is an integer number (345511740).

Almost surely, 2^20200111100 is an apocalyptic number.

20200111100 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 20200111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24876845280).

20200111100 is an abundant number, since it is smaller than the sum of its proper divisors (29553579460).

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

20200111100 is a wasteful number, since it uses less digits than its factorization.

20200111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840 (or 6833 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20200111100 its reverse (111100202), we get a palindrome (20311211302).

The spelling of 20200111100 in words is "twenty billion, two hundred million, one hundred eleven thousand, one hundred".