19768449 has 8 divisors (see below), whose sum is σ = 26417440. Its totient is φ = 13149216.

The previous prime is 19768447. The next prime is 19768451. The reversal of 19768449 is 94486791.

It is an interprime number because it is at equal distance from previous prime (19768447) and next prime (19768451).

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

It is not a de Polignac number, because 19768449 - 2¹ = 19768447 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19768398 and 19768407.

It is not an unprimeable number, because it can be changed into a prime (19768447) 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, 5839 + ... + 8580.

It is an arithmetic number, because the mean of its divisors is an integer number (3302180).

Almost surely, 2^19768449 is an apocalyptic number.

It is an amenable number.

19768449 is a deficient number, since it is larger than the sum of its proper divisors (6648991).

19768449 is a wasteful number, since it uses less digits than its factorization.

19768449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14879.

The product of its digits is 435456, while the sum is 48.

The square root of 19768449 is about 4446.1723988168. The cubic root of 19768449 is about 270.3901492697.

The spelling of 19768449 in words is "nineteen million, seven hundred sixty-eight thousand, four hundred forty-nine".