20008673 has 4 divisors (see below), whose sum is σ = 20018880. Its totient is φ = 19998468.

The previous prime is 20008669. The next prime is 20008721. The reversal of 20008673 is 37680002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20008673 - 2² = 20008669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20008603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1133 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (5004720).

Almost surely, 2^20008673 is an apocalyptic number.

It is an amenable number.

20008673 is a deficient number, since it is larger than the sum of its proper divisors (10207).

20008673 is an equidigital number, since it uses as much as digits as its factorization.

20008673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10206.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20008673 is about 4473.1055207764. The cubic root of 20008673 is about 271.4809928958.

Adding to 20008673 its reverse (37680002), we get a palindrome (57688675).

The spelling of 20008673 in words is "twenty million, eight thousand, six hundred seventy-three".