19314608491 has 2 divisors, whose sum is σ = 19314608492. Its totient is φ = 19314608490.

The previous prime is 19314608483. The next prime is 19314608543. The reversal of 19314608491 is 19480641391.

It is a weak prime.

It is an emirp because it is prime and its reverse (19480641391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19314608491 - 2³ = 19314608483 is a prime.

It is not a weakly prime, because it can be changed into another prime (19314608591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9657304245 + 9657304246.

It is an arithmetic number, because the mean of its divisors is an integer number (9657304246).

Almost surely, 2^19314608491 is an apocalyptic number.

19314608491 is a deficient number, since it is larger than the sum of its proper divisors (1).

19314608491 is an equidigital number, since it uses as much as digits as its factorization.

19314608491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 19314608491 in words is "nineteen billion, three hundred fourteen million, six hundred eight thousand, four hundred ninety-one".