20485580579 has 2 divisors, whose sum is σ = 20485580580. Its totient is φ = 20485580578.

The previous prime is 20485580539. The next prime is 20485580581. The reversal of 20485580579 is 97508558402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20485580579 is a prime.

It is a super-3 number, since 3×20485580579³ (a number of 32 digits) contains 333 as substring.

Together with 20485580581, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20485580579.

It is not a weakly prime, because it can be changed into another prime (20485580519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10242790289 + 10242790290.

It is an arithmetic number, because the mean of its divisors is an integer number (10242790290).

Almost surely, 2^20485580579 is an apocalyptic number.

20485580579 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485580579 is an equidigital number, since it uses as much as digits as its factorization.

20485580579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 20485580579 in words is "twenty billion, four hundred eighty-five million, five hundred eighty thousand, five hundred seventy-nine".