20411343323440 has 160 divisors (see below), whose sum is σ = 50354240872320. Its totient is φ = 7668025344000.

The previous prime is 20411343323429. The next prime is 20411343323471. The reversal of 20411343323440 is 4432334311402.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 20411343323396 and 20411343323405.

It is an unprimeable number.

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, 1981486290 + ... + 1981496590.

It is an arithmetic number, because the mean of its divisors is an integer number (314714005452).

Almost surely, 2^{20411343323440} is an apocalyptic number.

20411343323440 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 20411343323440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25177120436160).

20411343323440 is an abundant number, since it is smaller than the sum of its proper divisors (29942897548880).

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

20411343323440 is a wasteful number, since it uses less digits than its factorization.

20411343323440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13271 (or 13265 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 20411343323440 its reverse (4432334311402), we get a palindrome (24843677634842).

The spelling of 20411343323440 in words is "twenty trillion, four hundred eleven billion, three hundred forty-three million, three hundred twenty-three thousand, four hundred forty".