20320593209 has 12 divisors (see below), whose sum is σ = 23728184064. Its totient is φ = 17047050024.

The previous prime is 20320593203. The next prime is 20320593211. The reversal of 20320593209 is 90239502302.

It is not a de Polignac number, because 20320593209 - 2²⁰ = 20319544633 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20320593203) 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 11 ways as a sum of consecutive naturals, for example, 641609 + ... + 672534.

It is an arithmetic number, because the mean of its divisors is an integer number (1977348672).

Almost surely, 2^20320593209 is an apocalyptic number.

It is an amenable number.

20320593209 is a deficient number, since it is larger than the sum of its proper divisors (3407590855).

20320593209 is an equidigital number, since it uses as much as digits as its factorization.

20320593209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314244 (or 1314197 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 35.

The spelling of 20320593209 in words is "twenty billion, three hundred twenty million, five hundred ninety-three thousand, two hundred nine".