20144986759871 has 4 divisors (see below), whose sum is σ = 20204764168992. Its totient is φ = 20085209350752.

The previous prime is 20144986759847. The next prime is 20144986759897. The reversal of 20144986759871 is 17895768944102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20144986759871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20144986759795 and 20144986759804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144986756871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29888704055 + ... + 29888704728.

It is an arithmetic number, because the mean of its divisors is an integer number (5051191042248).

Almost surely, 2^{20144986759871} is an apocalyptic number.

20144986759871 is a deficient number, since it is larger than the sum of its proper divisors (59777409121).

20144986759871 is an equidigital number, since it uses as much as digits as its factorization.

20144986759871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59777409120.

The product of its (nonzero) digits is 243855360, while the sum is 71.

The spelling of 20144986759871 in words is "twenty trillion, one hundred forty-four billion, nine hundred eighty-six million, seven hundred fifty-nine thousand, eight hundred seventy-one".