20385339109 has 2 divisors, whose sum is σ = 20385339110. Its totient is φ = 20385339108.

The previous prime is 20385339101. The next prime is 20385339137. The reversal of 20385339109 is 90193358302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17225775009 + 3159564100 = 131247^2 + 56210^2 .

It is a cyclic number.

It is not a de Polignac number, because 20385339109 - 2³ = 20385339101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20385339101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192669554 + 10192669555.

It is an arithmetic number, because the mean of its divisors is an integer number (10192669555).

Almost surely, 2^20385339109 is an apocalyptic number.

It is an amenable number.

20385339109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20385339109 is an equidigital number, since it uses as much as digits as its factorization.

20385339109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 20385339109 in words is "twenty billion, three hundred eighty-five million, three hundred thirty-nine thousand, one hundred nine".