20868160139 has 2 divisors, whose sum is σ = 20868160140. Its totient is φ = 20868160138.

The previous prime is 20868160109. The next prime is 20868160171. The reversal of 20868160139 is 93106186802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20868160139 - 2⁸ = 20868159883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20868160139.

It is not a weakly prime, because it can be changed into another prime (20868160109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10434080069 + 10434080070.

It is an arithmetic number, because the mean of its divisors is an integer number (10434080070).

Almost surely, 2^20868160139 is an apocalyptic number.

20868160139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20868160139 is an equidigital number, since it uses as much as digits as its factorization.

20868160139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 20868160139 in words is "twenty billion, eight hundred sixty-eight million, one hundred sixty thousand, one hundred thirty-nine".