20005756253143 has 16 divisors (see below), whose sum is σ = 20438068392000. Its totient is φ = 19578081116160.

The previous prime is 20005756253111. The next prime is 20005756253149. The reversal of 20005756253143 is 34135265750002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20005756253143 - 2⁵ = 20005756253111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20005756253143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005756253149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4526863 + ... + 7778431.

It is an arithmetic number, because the mean of its divisors is an integer number (1277379274500).

Almost surely, 2^{20005756253143} is an apocalyptic number.

20005756253143 is a deficient number, since it is larger than the sum of its proper divisors (432312138857).

20005756253143 is a wasteful number, since it uses less digits than its factorization.

20005756253143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252282.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 20005756253143 in words is "twenty trillion, five billion, seven hundred fifty-six million, two hundred fifty-three thousand, one hundred forty-three".