19868487043 has 2 divisors, whose sum is σ = 19868487044. Its totient is φ = 19868487042.

The previous prime is 19868487031. The next prime is 19868487053. The reversal of 19868487043 is 34078486891.

It is a strong prime.

It is an emirp because it is prime and its reverse (34078486891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19868487043 - 2²¹ = 19866389891 is a prime.

It is not a weakly prime, because it can be changed into another prime (19868487053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9934243521 + 9934243522.

It is an arithmetic number, because the mean of its divisors is an integer number (9934243522).

Almost surely, 2^19868487043 is an apocalyptic number.

19868487043 is a deficient number, since it is larger than the sum of its proper divisors (1).

19868487043 is an equidigital number, since it uses as much as digits as its factorization.

19868487043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 19868487043 in words is "nineteen billion, eight hundred sixty-eight million, four hundred eighty-seven thousand, forty-three".