20424002400040 has 64 divisors (see below), whose sum is σ = 46265950863360. Its totient is φ = 8114161804800.

The previous prime is 20424002400037. The next prime is 20424002400047. The reversal of 20424002400040 is 4000420042402.

It is a junction number, because it is equal to n+sod(n) for n = 20424002399984 and 20424002400020.

It is not an unprimeable number, because it can be changed into a prime (20424002400047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36828492 + ... + 37378948.

It is an arithmetic number, because the mean of its divisors is an integer number (722905482240).

Almost surely, 2^{20424002400040} is an apocalyptic number.

20424002400040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424002400040 is an abundant number, since it is smaller than the sum of its proper divisors (25841948463320).

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

20424002400040 is a wasteful number, since it uses less digits than its factorization.

20424002400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556762 (or 556758 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20424002400040 its reverse (4000420042402), we get a palindrome (24424422442442).

The spelling of 20424002400040 in words is "twenty trillion, four hundred twenty-four billion, two million, four hundred thousand, forty".