20003444431100 has 144 divisors (see below), whose sum is σ = 48453512839200. Its totient is φ = 7117184363520.

The previous prime is 20003444431081. The next prime is 20003444431111. The reversal of 20003444431100 is 113444430002.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 20003444431100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18668087 + ... + 19710513.

It is an arithmetic number, because the mean of its divisors is an integer number (336482728050).

Almost surely, 2^{20003444431100} is an apocalyptic number.

20003444431100 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 20003444431100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24226756419600).

20003444431100 is an abundant number, since it is smaller than the sum of its proper divisors (28450068408100).

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

20003444431100 is a wasteful number, since it uses less digits than its factorization.

20003444431100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042992 (or 1042985 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20003444431100 its reverse (113444430002), we get a palindrome (20116888861102).

The spelling of 20003444431100 in words is "twenty trillion, three billion, four hundred forty-four million, four hundred thirty-one thousand, one hundred".