20047439782859 has 2 divisors, whose sum is σ = 20047439782860. Its totient is φ = 20047439782858.

The previous prime is 20047439782813. The next prime is 20047439782879. The reversal of 20047439782859 is 95828793474002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20047439782859 - 2⁴⁰ = 18947928155083 is a prime.

It is not a weakly prime, because it can be changed into another prime (20047439782879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10023719891429 + 10023719891430.

It is an arithmetic number, because the mean of its divisors is an integer number (10023719891430).

Almost surely, 2^{20047439782859} is an apocalyptic number.

20047439782859 is a deficient number, since it is larger than the sum of its proper divisors (1).

20047439782859 is an equidigital number, since it uses as much as digits as its factorization.

20047439782859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243855360, while the sum is 68.

The spelling of 20047439782859 in words is "twenty trillion, forty-seven billion, four hundred thirty-nine million, seven hundred eighty-two thousand, eight hundred fifty-nine".