20687365339 has 2 divisors, whose sum is σ = 20687365340. Its totient is φ = 20687365338.

The previous prime is 20687365333. The next prime is 20687365411. The reversal of 20687365339 is 93356378602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20687365339 - 2²⁵ = 20653810907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20687365333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10343682669 + 10343682670.

It is an arithmetic number, because the mean of its divisors is an integer number (10343682670).

Almost surely, 2^20687365339 is an apocalyptic number.

20687365339 is a deficient number, since it is larger than the sum of its proper divisors (1).

20687365339 is an equidigital number, since it uses as much as digits as its factorization.

20687365339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 20687365339 in words is "twenty billion, six hundred eighty-seven million, three hundred sixty-five thousand, three hundred thirty-nine".