20504443757 has 8 divisors (see below), whose sum is σ = 23445025536. Its totient is φ = 17566705872.

The previous prime is 20504443667. The next prime is 20504443763. The reversal of 20504443757 is 75734440502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20504443757 - 2²⁰ = 20503395181 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 (20504443777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695498 + ... + 724379.

It is an arithmetic number, because the mean of its divisors is an integer number (2930628192).

Almost surely, 2^20504443757 is an apocalyptic number.

It is an amenable number.

20504443757 is a deficient number, since it is larger than the sum of its proper divisors (2940581779).

20504443757 is a wasteful number, since it uses less digits than its factorization.

20504443757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421947.

The product of its (nonzero) digits is 470400, while the sum is 41.

The spelling of 20504443757 in words is "twenty billion, five hundred four million, four hundred forty-three thousand, seven hundred fifty-seven".