20585848991 has 8 divisors (see below), whose sum is σ = 20867689584. Its totient is φ = 20304813760.

The previous prime is 20585848937. The next prime is 20585849017. The reversal of 20585848991 is 19984858502.

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 20585848991 - 2¹⁰ = 20585847967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20585848991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20585848931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149780 + ... + 252201.

It is an arithmetic number, because the mean of its divisors is an integer number (2608461198).

Almost surely, 2^20585848991 is an apocalyptic number.

20585848991 is a deficient number, since it is larger than the sum of its proper divisors (281840593).

20585848991 is an equidigital number, since it uses as much as digits as its factorization.

20585848991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402681.

The product of its (nonzero) digits is 8294400, while the sum is 59.

The spelling of 20585848991 in words is "twenty billion, five hundred eighty-five million, eight hundred forty-eight thousand, nine hundred ninety-one".