20394673 has 8 divisors (see below), whose sum is σ = 22113000. Its totient is φ = 18697728.

The previous prime is 20394643. The next prime is 20394691. The reversal of 20394673 is 37649302.

It can be written as a sum of positive squares in 4 ways, for example, as 431649 + 19963024 = 657^2 + 4468^2 .

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 20394673 - 2⁵ = 20394641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20394613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3328 + ... + 7201.

It is an arithmetic number, because the mean of its divisors is an integer number (2764125).

Almost surely, 2^20394673 is an apocalyptic number.

It is an amenable number.

20394673 is a deficient number, since it is larger than the sum of its proper divisors (1718327).

20394673 is a wasteful number, since it uses less digits than its factorization.

20394673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10691.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20394673 is about 4516.0461689403. The cubic root of 20394673 is about 273.2156560993.

The spelling of 20394673 in words is "twenty million, three hundred ninety-four thousand, six hundred seventy-three".