20113102100 has 144 divisors (see below), whose sum is σ = 56053579008. Its totient is φ = 6088642560.

The previous prime is 20113102081. The next prime is 20113102103. The reversal of 20113102100 is 120131102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113102103) 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 47 ways as a sum of consecutive naturals, for example, 161252 + ... + 257348.

Almost surely, 2^20113102100 is an apocalyptic number.

20113102100 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 20113102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28026789504).

20113102100 is an abundant number, since it is smaller than the sum of its proper divisors (35940476908).

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

20113102100 is a wasteful number, since it uses less digits than its factorization.

20113102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96154 (or 96147 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20113102100 its reverse (120131102), we get a palindrome (20233233202).

The spelling of 20113102100 in words is "twenty billion, one hundred thirteen million, one hundred two thousand, one hundred".