20441121500 has 96 divisors (see below), whose sum is σ = 47061181440. Its totient is φ = 7734888000.

The previous prime is 20441121473. The next prime is 20441121541. The reversal of 20441121500 is 512114402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9793457 + ... + 9795543.

It is an arithmetic number, because the mean of its divisors is an integer number (490220640).

Almost surely, 2^20441121500 is an apocalyptic number.

20441121500 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 20441121500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23530590720).

20441121500 is an abundant number, since it is smaller than the sum of its proper divisors (26620059940).

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

20441121500 is a wasteful number, since it uses less digits than its factorization.

20441121500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156 (or 3144 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20441121500 its reverse (512114402), we get a palindrome (20953235902).

The spelling of 20441121500 in words is "twenty billion, four hundred forty-one million, one hundred twenty-one thousand, five hundred".