19898463 has 8 divisors (see below), whose sum is σ = 28572208. Its totient is φ = 12245184.

The previous prime is 19898443. The next prime is 19898471. The reversal of 19898463 is 36489891.

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

It is not a de Polignac number, because 19898463 - 2⁹ = 19897951 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 (19898443) 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, 255070 + ... + 255147.

It is an arithmetic number, because the mean of its divisors is an integer number (3571526).

Almost surely, 2^19898463 is an apocalyptic number.

19898463 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19898463 is a deficient number, since it is larger than the sum of its proper divisors (8673745).

19898463 is a wasteful number, since it uses less digits than its factorization.

19898463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510233.

The product of its digits is 373248, while the sum is 48.

The square root of 19898463 is about 4460.7693282661. The cubic root of 19898463 is about 270.9816257292.

The spelling of 19898463 in words is "nineteen million, eight hundred ninety-eight thousand, four hundred sixty-three".