20144123411440 has 80 divisors (see below), whose sum is σ = 53557136141760. Its totient is φ = 6902514984960.

The previous prime is 20144123411429. The next prime is 20144123411471. The reversal of 20144123411440 is 4411432144102.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 9567141 + ... + 11481220.

It is an arithmetic number, because the mean of its divisors is an integer number (669464201772).

Almost surely, 2^{20144123411440} is an apocalyptic number.

20144123411440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144123411440 is an abundant number, since it is smaller than the sum of its proper divisors (33413012730320).

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

20144123411440 is a wasteful number, since it uses less digits than its factorization.

20144123411440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21050090 (or 21050084 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 20144123411440 its reverse (4411432144102), we get a palindrome (24555555555542).

The spelling of 20144123411440 in words is "twenty trillion, one hundred forty-four billion, one hundred twenty-three million, four hundred eleven thousand, four hundred forty".