20031102032100 has 144 divisors (see below), whose sum is σ = 58668588595008. Its totient is φ = 5276041218560.

The previous prime is 20031102032099. The next prime is 20031102032153. The reversal of 20031102032100 is 123020113002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20031102032100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109393822 + ... + 109576778.

It is an arithmetic number, because the mean of its divisors is an integer number (407420754132).

Almost surely, 2^{20031102032100} is an apocalyptic number.

20031102032100 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 20031102032100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29334294297504).

20031102032100 is an abundant number, since it is smaller than the sum of its proper divisors (38637486562908).

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

20031102032100 is a wasteful number, since it uses less digits than its factorization.

20031102032100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187454 (or 187447 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20031102032100 its reverse (123020113002), we get a palindrome (20154122145102).

The spelling of 20031102032100 in words is "twenty trillion, thirty-one billion, one hundred two million, thirty-two thousand, one hundred".