20575956839 has 4 divisors (see below), whose sum is σ = 20865759120. Its totient is φ = 20286154560.

The previous prime is 20575956827. The next prime is 20575956857. The reversal of 20575956839 is 93865957502.

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

It is a cyclic number.

It is not a de Polignac number, because 20575956839 - 2⁴ = 20575956823 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 (20575956859) 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 3 ways as a sum of consecutive naturals, for example, 144901034 + ... + 144901175.

It is an arithmetic number, because the mean of its divisors is an integer number (5216439780).

Almost surely, 2^20575956839 is an apocalyptic number.

20575956839 is a deficient number, since it is larger than the sum of its proper divisors (289802281).

20575956839 is an equidigital number, since it uses as much as digits as its factorization.

20575956839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289802280.

The product of its (nonzero) digits is 20412000, while the sum is 59.

The spelling of 20575956839 in words is "twenty billion, five hundred seventy-five million, nine hundred fifty-six thousand, eight hundred thirty-nine".