19355489999 has 2 divisors, whose sum is σ = 19355490000. Its totient is φ = 19355489998.

The previous prime is 19355489971. The next prime is 19355490047. The reversal of 19355489999 is 99998455391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19355489999 - 2⁸ = 19355489743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19355489929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9677744999 + 9677745000.

It is an arithmetic number, because the mean of its divisors is an integer number (9677745000).

Almost surely, 2^19355489999 is an apocalyptic number.

19355489999 is a deficient number, since it is larger than the sum of its proper divisors (1).

19355489999 is an equidigital number, since it uses as much as digits as its factorization.

19355489999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141717600, while the sum is 71.

The spelling of 19355489999 in words is "nineteen billion, three hundred fifty-five million, four hundred eighty-nine thousand, nine hundred ninety-nine".