20384393459 has 2 divisors, whose sum is σ = 20384393460. Its totient is φ = 20384393458.

The previous prime is 20384393417. The next prime is 20384393483. The reversal of 20384393459 is 95439348302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20384393459 is a prime.

It is not a weakly prime, because it can be changed into another prime (20384993459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192196729 + 10192196730.

It is an arithmetic number, because the mean of its divisors is an integer number (10192196730).

Almost surely, 2^20384393459 is an apocalyptic number.

20384393459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20384393459 is an equidigital number, since it uses as much as digits as its factorization.

20384393459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 20384393459 in words is "twenty billion, three hundred eighty-four million, three hundred ninety-three thousand, four hundred fifty-nine".