19804320463 has 2 divisors, whose sum is σ = 19804320464. Its totient is φ = 19804320462.

The previous prime is 19804320377. The next prime is 19804320469. The reversal of 19804320463 is 36402340891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19804320463 - 2²⁵ = 19770766031 is a prime.

It is a super-2 number, since 2×19804320463² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19804320469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9902160231 + 9902160232.

It is an arithmetic number, because the mean of its divisors is an integer number (9902160232).

Almost surely, 2^19804320463 is an apocalyptic number.

19804320463 is a deficient number, since it is larger than the sum of its proper divisors (1).

19804320463 is an equidigital number, since it uses as much as digits as its factorization.

19804320463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 19804320463 in words is "nineteen billion, eight hundred four million, three hundred twenty thousand, four hundred sixty-three".