20670505619579 has 2 divisors, whose sum is σ = 20670505619580. Its totient is φ = 20670505619578.

The previous prime is 20670505619537. The next prime is 20670505619593. The reversal of 20670505619579 is 97591650507602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20670505619579 - 2¹⁶ = 20670505554043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20670505619779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335252809789 + 10335252809790.

It is an arithmetic number, because the mean of its divisors is an integer number (10335252809790).

Almost surely, 2^{20670505619579} is an apocalyptic number.

20670505619579 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670505619579 is an equidigital number, since it uses as much as digits as its factorization.

20670505619579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35721000, while the sum is 62.

The spelling of 20670505619579 in words is "twenty trillion, six hundred seventy billion, five hundred five million, six hundred nineteen thousand, five hundred seventy-nine".