20256750659789 has 32 divisors (see below), whose sum is σ = 24179664844800. Its totient is φ = 16602739957440.

The previous prime is 20256750659767. The next prime is 20256750659851. The reversal of 20256750659789 is 98795605765202.

It is a de Polignac number, because none of the positive numbers 2^k-20256750659789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256750659749) 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, 76129622 + ... + 76395240.

It is an arithmetic number, because the mean of its divisors is an integer number (755614526400).

Almost surely, 2^{20256750659789} is an apocalyptic number.

20256750659789 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20256750659789 is a deficient number, since it is larger than the sum of its proper divisors (3922914185011).

20256750659789 is a wasteful number, since it uses less digits than its factorization.

20256750659789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269273.

The product of its (nonzero) digits is 571536000, while the sum is 71.

The spelling of 20256750659789 in words is "twenty trillion, two hundred fifty-six billion, seven hundred fifty million, six hundred fifty-nine thousand, seven hundred eighty-nine".