19385910229397 has 2 divisors, whose sum is σ = 19385910229398. Its totient is φ = 19385910229396.

The previous prime is 19385910229393. The next prime is 19385910229457. The reversal of 19385910229397 is 79392201958391.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19353189399076 + 32720830321 = 4399226^2 + 180889^2 .

It is a cyclic number.

It is not a de Polignac number, because 19385910229397 - 2² = 19385910229393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19385910229393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9692955114698 + 9692955114699.

It is an arithmetic number, because the mean of its divisors is an integer number (9692955114699).

Almost surely, 2^{19385910229397} is an apocalyptic number.

It is an amenable number.

19385910229397 is a deficient number, since it is larger than the sum of its proper divisors (1).

19385910229397 is an equidigital number, since it uses as much as digits as its factorization.

19385910229397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66134880, while the sum is 68.

The spelling of 19385910229397 in words is "nineteen trillion, three hundred eighty-five billion, nine hundred ten million, two hundred twenty-nine thousand, three hundred ninety-seven".