20244343240 has 256 divisors, whose sum is σ = 54411160320. Its totient is φ = 6695485440.

The previous prime is 20244343213. The next prime is 20244343241. The reversal of 20244343240 is 4234344202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20244343199 and 20244343208.

It is not an unprimeable number, because it can be changed into a prime (20244343241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36345042 + ... + 36345598.

It is an arithmetic number, because the mean of its divisors is an integer number (212543595).

Almost surely, 2^20244343240 is an apocalyptic number.

20244343240 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 20244343240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27205580160).

20244343240 is an abundant number, since it is smaller than the sum of its proper divisors (34166817080).

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

20244343240 is a wasteful number, since it uses less digits than its factorization.

20244343240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20244343240 its reverse (4234344202), we get a palindrome (24478687442).

The spelling of 20244343240 in words is "twenty billion, two hundred forty-four million, three hundred forty-three thousand, two hundred forty".