19698223 has 4 divisors (see below), whose sum is σ = 20856960. Its totient is φ = 18539488.

The previous prime is 19698209. The next prime is 19698233. The reversal of 19698223 is 32289691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32289691 = 7 ⋅4612813.

It is a cyclic number.

It is not a de Polignac number, because 19698223 - 2⁵ = 19698191 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19698233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579343 + ... + 579376.

It is an arithmetic number, because the mean of its divisors is an integer number (5214240).

Almost surely, 2^19698223 is an apocalyptic number.

19698223 is a deficient number, since it is larger than the sum of its proper divisors (1158737).

19698223 is a wasteful number, since it uses less digits than its factorization.

19698223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158736.

The product of its digits is 46656, while the sum is 40.

The square root of 19698223 is about 4438.2680180449. The cubic root of 19698223 is about 270.0695888301.

The spelling of 19698223 in words is "nineteen million, six hundred ninety-eight thousand, two hundred twenty-three".