19962763066549 has 2 divisors, whose sum is σ = 19962763066550. Its totient is φ = 19962763066548.

The previous prime is 19962763066523. The next prime is 19962763066591. The reversal of 19962763066549 is 94566036726991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14194191880324 + 5768571186225 = 3767518^2 + 2401785^2 .

It is a cyclic number.

It is not a de Polignac number, because 19962763066549 - 2¹⁷ = 19962762935477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19962763066249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9981381533274 + 9981381533275.

It is an arithmetic number, because the mean of its divisors is an integer number (9981381533275).

Almost surely, 2^{19962763066549} is an apocalyptic number.

It is an amenable number.

19962763066549 is a deficient number, since it is larger than the sum of its proper divisors (1).

19962763066549 is an equidigital number, since it uses as much as digits as its factorization.

19962763066549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793618560, while the sum is 73.

The spelling of 19962763066549 in words is "nineteen trillion, nine hundred sixty-two billion, seven hundred sixty-three million, sixty-six thousand, five hundred forty-nine".