19998463 has 8 divisors (see below), whose sum is σ = 20889360. Its totient is φ = 19126080.

The previous prime is 19998427. The next prime is 19998479. The reversal of 19998463 is 36489991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19998463 - 2¹⁷ = 19867391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19998403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2398 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (2611170).

Almost surely, 2^19998463 is an apocalyptic number.

19998463 is a deficient number, since it is larger than the sum of its proper divisors (890897).

19998463 is an equidigital number, since it uses as much as digits as its factorization.

19998463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9257.

The product of its digits is 419904, while the sum is 49.

The square root of 19998463 is about 4471.9641098739. The cubic root of 19998463 is about 271.4348080482.

The spelling of 19998463 in words is "nineteen million, nine hundred ninety-eight thousand, four hundred sixty-three".