20123030100 has 144 divisors (see below), whose sum is σ = 59360645120. Its totient is φ = 5262192000.

The previous prime is 20123030099. The next prime is 20123030107. The reversal of 20123030100 is 103032102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123030107) 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, 3575889 + ... + 3581511.

Almost surely, 2^20123030100 is an apocalyptic number.

20123030100 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 20123030100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29680322560).

20123030100 is an abundant number, since it is smaller than the sum of its proper divisors (39237615020).

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

20123030100 is a wasteful number, since it uses less digits than its factorization.

20123030100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870 (or 5863 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20123030100 its reverse (103032102), we get a palindrome (20226062202).

The spelling of 20123030100 in words is "twenty billion, one hundred twenty-three million, thirty thousand, one hundred".