20243241240 has 128 divisors (see below), whose sum is σ = 61597670400. Its totient is φ = 5321272320.

The previous prime is 20243241223. The next prime is 20243241241. The reversal of 20243241240 is 4214234202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20243241240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243241241) 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 31 ways as a sum of consecutive naturals, for example, 7686964 + ... + 7689596.

It is an arithmetic number, because the mean of its divisors is an integer number (481231800).

Almost surely, 2^20243241240 is an apocalyptic number.

20243241240 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 20243241240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30798835200).

20243241240 is an abundant number, since it is smaller than the sum of its proper divisors (41354429160).

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

20243241240 is a wasteful number, since it uses less digits than its factorization.

20243241240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537 (or 3533 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20243241240 its reverse (4214234202), we get a palindrome (24457475442).

The spelling of 20243241240 in words is "twenty billion, two hundred forty-three million, two hundred forty-one thousand, two hundred forty".