19679245 has 8 divisors (see below), whose sum is σ = 23738616. Its totient is φ = 15661056.

The previous prime is 19679243. The next prime is 19679281. The reversal of 19679245 is 54297691.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 826281 + 18852964 = 909^2 + 4342^2 .

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 19679245 - 2¹ = 19679243 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 (19679243) 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, 9232 + ... + 11161.

It is an arithmetic number, because the mean of its divisors is an integer number (2967327).

Almost surely, 2^19679245 is an apocalyptic number.

It is an amenable number.

19679245 is a deficient number, since it is larger than the sum of its proper divisors (4059371).

19679245 is a wasteful number, since it uses less digits than its factorization.

19679245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20591.

The product of its digits is 136080, while the sum is 43.

The square root of 19679245 is about 4436.1295066758. The cubic root of 19679245 is about 269.9828292693.

The spelling of 19679245 in words is "nineteen million, six hundred seventy-nine thousand, two hundred forty-five".