20385339137 has 2 divisors, whose sum is σ = 20385339138. Its totient is φ = 20385339136.

The previous prime is 20385339109. The next prime is 20385339179. The reversal of 20385339137 is 73193358302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20358723856 + 26615281 = 142684^2 + 5159^2 .

It is a cyclic number.

It is not a de Polignac number, because 20385339137 - 2⁸ = 20385338881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20325339137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192669568 + 10192669569.

It is an arithmetic number, because the mean of its divisors is an integer number (10192669569).

Almost surely, 2^20385339137 is an apocalyptic number.

It is an amenable number.

20385339137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20385339137 is an equidigital number, since it uses as much as digits as its factorization.

20385339137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 20385339137 in words is "twenty billion, three hundred eighty-five million, three hundred thirty-nine thousand, one hundred thirty-seven".