20875647139 has 2 divisors, whose sum is σ = 20875647140. Its totient is φ = 20875647138.

The previous prime is 20875647109. The next prime is 20875647157. The reversal of 20875647139 is 93174657802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20875647139 - 2¹³ = 20875638947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20875647109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10437823569 + 10437823570.

It is an arithmetic number, because the mean of its divisors is an integer number (10437823570).

It is a 1-persistent number, because it is pandigital, but 2⋅20875647139 = 41751294278 is not.

Almost surely, 2^20875647139 is an apocalyptic number.

20875647139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20875647139 is an equidigital number, since it uses as much as digits as its factorization.

20875647139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 20875647139 in words is "twenty billion, eight hundred seventy-five million, six hundred forty-seven thousand, one hundred thirty-nine".