20863340879 has 2 divisors, whose sum is σ = 20863340880. Its totient is φ = 20863340878.

The previous prime is 20863340867. The next prime is 20863340903. The reversal of 20863340879 is 97804336802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20863340879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20863340819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431670439 + 10431670440.

It is an arithmetic number, because the mean of its divisors is an integer number (10431670440).

Almost surely, 2^20863340879 is an apocalyptic number.

20863340879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20863340879 is an equidigital number, since it uses as much as digits as its factorization.

20863340879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 20863340879 in words is "twenty billion, eight hundred sixty-three million, three hundred forty thousand, eight hundred seventy-nine".