19386964417 has 2 divisors, whose sum is σ = 19386964418. Its totient is φ = 19386964416.

The previous prime is 19386964367. The next prime is 19386964423. The reversal of 19386964417 is 71446968391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17097916081 + 2289048336 = 130759^2 + 47844^2 .

It is a cyclic number.

It is not a de Polignac number, because 19386964417 - 2¹⁵ = 19386931649 is a prime.

It is not a weakly prime, because it can be changed into another prime (19386964447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9693482208 + 9693482209.

It is an arithmetic number, because the mean of its divisors is an integer number (9693482209).

Almost surely, 2^19386964417 is an apocalyptic number.

It is an amenable number.

19386964417 is a deficient number, since it is larger than the sum of its proper divisors (1).

19386964417 is an equidigital number, since it uses as much as digits as its factorization.

19386964417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The spelling of 19386964417 in words is "nineteen billion, three hundred eighty-six million, nine hundred sixty-four thousand, four hundred seventeen".