20041244400 has 120 divisors (see below), whose sum is σ = 64298741760. Its totient is φ = 5336011520.

The previous prime is 20041244387. The next prime is 20041244401. The reversal of 20041244400 is 444214002.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041244401) 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 23 ways as a sum of consecutive naturals, for example, 778129 + ... + 803471.

It is an arithmetic number, because the mean of its divisors is an integer number (535822848).

Almost surely, 2^20041244400 is an apocalyptic number.

20041244400 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 20041244400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32149370880).

20041244400 is an abundant number, since it is smaller than the sum of its proper divisors (44257497360).

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

20041244400 is a wasteful number, since it uses less digits than its factorization.

20041244400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023 (or 26012 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20041244400 its reverse (444214002), we get a palindrome (20485458402).

The spelling of 20041244400 in words is "twenty billion, forty-one million, two hundred forty-four thousand, four hundred".