20560103491 has 2 divisors, whose sum is σ = 20560103492. Its totient is φ = 20560103490.

The previous prime is 20560103483. The next prime is 20560103507. The reversal of 20560103491 is 19430106502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20560103491 - 2³ = 20560103483 is a prime.

It is not a weakly prime, because it can be changed into another prime (20560103401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10280051745 + 10280051746.

It is an arithmetic number, because the mean of its divisors is an integer number (10280051746).

Almost surely, 2^20560103491 is an apocalyptic number.

20560103491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20560103491 is an equidigital number, since it uses as much as digits as its factorization.

20560103491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 20560103491 its reverse (19430106502), we get a palindrome (39990209993).

The spelling of 20560103491 in words is "twenty billion, five hundred sixty million, one hundred three thousand, four hundred ninety-one".