19898249 has 16 divisors (see below), whose sum is σ = 23986176. Its totient is φ = 16146000.

The previous prime is 19898239. The next prime is 19898299. The reversal of 19898249 is 94289891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19898249 - 2²⁴ = 3121033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19898197 and 19898206.

It is not an unprimeable number, because it can be changed into a prime (19898239) 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, 9224 + ... + 11174.

It is an arithmetic number, because the mean of its divisors is an integer number (1499136).

Almost surely, 2^19898249 is an apocalyptic number.

It is an amenable number.

19898249 is a deficient number, since it is larger than the sum of its proper divisors (4087927).

19898249 is a wasteful number, since it uses less digits than its factorization.

19898249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its digits is 373248, while the sum is 50.

The square root of 19898249 is about 4460.7453413079. The cubic root of 19898249 is about 270.9806542927.

The spelling of 19898249 in words is "nineteen million, eight hundred ninety-eight thousand, two hundred forty-nine".