20043040240 has 40 divisors (see below), whose sum is σ = 47736663408. Its totient is φ = 7821672960.

The previous prime is 20043040229. The next prime is 20043040247. The reversal of 20043040240 is 4204034002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043040247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3052062 + ... + 3058621.

Almost surely, 2^20043040240 is an apocalyptic number.

20043040240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20043040240 is an abundant number, since it is smaller than the sum of its proper divisors (27693623168).

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

20043040240 is a wasteful number, since it uses less digits than its factorization.

20043040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110737 (or 6110731 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20043040240 its reverse (4204034002), we get a palindrome (24247074242).

The spelling of 20043040240 in words is "twenty billion, forty-three million, forty thousand, two hundred forty".