20005756253142 has 64 divisors (see below), whose sum is σ = 43990470144000. Its totient is φ = 6015082978080.

The previous prime is 20005756253111. The next prime is 20005756253149. The reversal of 20005756253142 is 24135265750002.

It is a junction number, because it is equal to n+sod(n) for n = 20005756253094 and 20005756253103.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2593653 + ... + 6836559.

It is an arithmetic number, because the mean of its divisors is an integer number (687351096000).

Almost surely, 2^{20005756253142} is an apocalyptic number.

20005756253142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20005756253142 is an abundant number, since it is smaller than the sum of its proper divisors (23984713890858).

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

20005756253142 is a wasteful number, since it uses less digits than its factorization.

20005756253142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243481.

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 20005756253142 in words is "twenty trillion, five billion, seven hundred fifty-six million, two hundred fifty-three thousand, one hundred forty-two".