19861459199 has 2 divisors, whose sum is σ = 19861459200. Its totient is φ = 19861459198.

The previous prime is 19861459181. The next prime is 19861459201. The reversal of 19861459199 is 99195416891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19861459199 - 2¹⁶ = 19861393663 is a prime.

It is a Sophie Germain prime.

Together with 19861459201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19861459109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9930729599 + 9930729600.

It is an arithmetic number, because the mean of its divisors is an integer number (9930729600).

Almost surely, 2^19861459199 is an apocalyptic number.

19861459199 is a deficient number, since it is larger than the sum of its proper divisors (1).

19861459199 is an equidigital number, since it uses as much as digits as its factorization.

19861459199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 62.

The spelling of 19861459199 in words is "nineteen billion, eight hundred sixty-one million, four hundred fifty-nine thousand, one hundred ninety-nine".