19998196463 has 16 divisors (see below), whose sum is σ = 23062663680. Its totient is φ = 16986088800.

The previous prime is 19998196451. The next prime is 19998196513. The reversal of 19998196463 is 36469189991.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19998196463 - 2⁶ = 19998196399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19998196463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19998196763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507398 + ... + 545388.

It is an arithmetic number, because the mean of its divisors is an integer number (1441416480).

Almost surely, 2^19998196463 is an apocalyptic number.

19998196463 is a deficient number, since it is larger than the sum of its proper divisors (3064467217).

19998196463 is a wasteful number, since it uses less digits than its factorization.

19998196463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38678.

The product of its digits is 22674816, while the sum is 65.

The spelling of 19998196463 in words is "nineteen billion, nine hundred ninety-eight million, one hundred ninety-six thousand, four hundred sixty-three".