20013340142440 has 64 divisors (see below), whose sum is σ = 45744084144000. Its totient is φ = 7879363257600.

The previous prime is 20013340142437. The next prime is 20013340142461. The reversal of 20013340142440 is 4424104331002.

It is a junction number, because it is equal to n+sod(n) for n = 20013340142399 and 20013340142408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14541030 + ... + 15857749.

It is an arithmetic number, because the mean of its divisors is an integer number (714751314750).

Almost surely, 2^{20013340142440} is an apocalyptic number.

20013340142440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013340142440 is an abundant number, since it is smaller than the sum of its proper divisors (25730744001560).

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

20013340142440 is a wasteful number, since it uses less digits than its factorization.

20013340142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30399050 (or 30399046 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20013340142440 its reverse (4424104331002), we get a palindrome (24437444473442).

The spelling of 20013340142440 in words is "twenty trillion, thirteen billion, three hundred forty million, one hundred forty-two thousand, four hundred forty".