20387832847 has 2 divisors, whose sum is σ = 20387832848. Its totient is φ = 20387832846.

The previous prime is 20387832781. The next prime is 20387832863. The reversal of 20387832847 is 74823878302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20387832847 - 2⁷ = 20387832719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20387832794 and 20387832803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20387832877) 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, 10193916423 + 10193916424.

It is an arithmetic number, because the mean of its divisors is an integer number (10193916424).

Almost surely, 2^20387832847 is an apocalyptic number.

20387832847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20387832847 is an equidigital number, since it uses as much as digits as its factorization.

20387832847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 20387832847 in words is "twenty billion, three hundred eighty-seven million, eight hundred thirty-two thousand, eight hundred forty-seven".