20043234240040 has 64 divisors (see below), whose sum is σ = 49789764884160. Its totient is φ = 7200636165120.

The previous prime is 20043234239999. The next prime is 20043234240067. The reversal of 20043234240040 is 4004243234002.

It is a happy number.

It is a super-2 number, since 2×20043234240040² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20043234239990 and 20043234240008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274377969 + ... + 274451008.

It is an arithmetic number, because the mean of its divisors is an integer number (777965076315).

Almost surely, 2^{20043234240040} is an apocalyptic number.

20043234240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20043234240040 is an abundant number, since it is smaller than the sum of its proper divisors (29746530644120).

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

20043234240040 is a wasteful number, since it uses less digits than its factorization.

20043234240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548829082 (or 548829078 counting only the distinct ones).

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

Adding to 20043234240040 its reverse (4004243234002), we get a palindrome (24047477474042).

The spelling of 20043234240040 in words is "twenty trillion, forty-three billion, two hundred thirty-four million, two hundred forty thousand, forty".