19620666009019 has 2 divisors, whose sum is σ = 19620666009020. Its totient is φ = 19620666009018.

The previous prime is 19620666009001. The next prime is 19620666009031. The reversal of 19620666009019 is 91090066602691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19620666009019 - 2¹⁷ = 19620665877947 is a prime.

It is a super-2 number, since 2×19620666009019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19620666009059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9810333004509 + 9810333004510.

It is an arithmetic number, because the mean of its divisors is an integer number (9810333004510).

Almost surely, 2^{19620666009019} is an apocalyptic number.

19620666009019 is a deficient number, since it is larger than the sum of its proper divisors (1).

19620666009019 is an equidigital number, since it uses as much as digits as its factorization.

19620666009019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The spelling of 19620666009019 in words is "nineteen trillion, six hundred twenty billion, six hundred sixty-six million, nine thousand, nineteen".