20441231040 has 224 divisors, whose sum is σ = 65983104000. Its totient is φ = 5360689152.

The previous prime is 20441231039. The next prime is 20441231047. The reversal of 20441231040 is 4013214402.

It is a junction number, because it is equal to n+sod(n) for n = 20441230998 and 20441231016.

It is not an unprimeable number, because it can be changed into a prime (20441231047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31018231 + ... + 31018889.

Almost surely, 2^20441231040 is an apocalyptic number.

20441231040 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 20441231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32991552000).

20441231040 is an abundant number, since it is smaller than the sum of its proper divisors (45541872960).

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

20441231040 is a wasteful number, since it uses less digits than its factorization.

20441231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20441231040 its reverse (4013214402), we get a palindrome (24454445442).

The spelling of 20441231040 in words is "twenty billion, four hundred forty-one million, two hundred thirty-one thousand, forty".