20723100431100 has 144 divisors (see below), whose sum is σ = 60078342656640. Its totient is φ = 5515153862400.

The previous prime is 20723100431071. The next prime is 20723100431149. The reversal of 20723100431100 is 113400132702.

It is a happy number.

It is a congruent number.

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, 435509310 + ... + 435556890.

Almost surely, 2^{20723100431100} is an apocalyptic number.

20723100431100 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 20723100431100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30039171328320).

20723100431100 is an abundant number, since it is smaller than the sum of its proper divisors (39355242225540).

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

20723100431100 is a wasteful number, since it uses less digits than its factorization.

20723100431100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50460 (or 50453 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

Adding to 20723100431100 its reverse (113400132702), we get a palindrome (20836500563802).

The spelling of 20723100431100 in words is "twenty trillion, seven hundred twenty-three billion, one hundred million, four hundred thirty-one thousand, one hundred".