20605873459 has 2 divisors, whose sum is σ = 20605873460. Its totient is φ = 20605873458.

The previous prime is 20605873423. The next prime is 20605873481. The reversal of 20605873459 is 95437850602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20605873459 - 2¹⁷ = 20605742387 is a prime.

It is not a weakly prime, because it can be changed into another prime (20605873159) 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, 10302936729 + 10302936730.

It is an arithmetic number, because the mean of its divisors is an integer number (10302936730).

Almost surely, 2^20605873459 is an apocalyptic number.

20605873459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20605873459 is an equidigital number, since it uses as much as digits as its factorization.

20605873459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 20605873459 in words is "twenty billion, six hundred five million, eight hundred seventy-three thousand, four hundred fifty-nine".