19798673 has 8 divisors (see below), whose sum is σ = 20169000. Its totient is φ = 19431808.

The previous prime is 19798643. The next prime is 19798679. The reversal of 19798673 is 37689791.

It can be written as a sum of positive squares in 4 ways, for example, as 937024 + 18861649 = 968^2 + 4343^2 .

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 19798673 - 2¹⁸ = 19536529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19798679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12515 + ... + 14007.

It is an arithmetic number, because the mean of its divisors is an integer number (2521125).

Almost surely, 2^19798673 is an apocalyptic number.

It is an amenable number.

19798673 is a deficient number, since it is larger than the sum of its proper divisors (370327).

19798673 is a wasteful number, since it uses less digits than its factorization.

19798673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731.

The product of its digits is 571536, while the sum is 50.

The square root of 19798673 is about 4449.5699792227. The cubic root of 19798673 is about 270.5278790184.

The spelling of 19798673 in words is "nineteen million, seven hundred ninety-eight thousand, six hundred seventy-three".