20069986549 has 2 divisors, whose sum is σ = 20069986550. Its totient is φ = 20069986548.

The previous prime is 20069986537. The next prime is 20069986567. The reversal of 20069986549 is 94568996002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12711435025 + 7358551524 = 112745^2 + 85782^2 .

It is a cyclic number.

It is not a de Polignac number, because 20069986549 - 2¹⁹ = 20069462261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20069986493 and 20069986502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20069986049) 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, 10034993274 + 10034993275.

It is an arithmetic number, because the mean of its divisors is an integer number (10034993275).

Almost surely, 2^20069986549 is an apocalyptic number.

It is an amenable number.

20069986549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20069986549 is an equidigital number, since it uses as much as digits as its factorization.

20069986549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 20069986549 in words is "twenty billion, sixty-nine million, nine hundred eighty-six thousand, five hundred forty-nine".