20673893 has 2 divisors, whose sum is σ = 20673894. Its totient is φ = 20673892.

The previous prime is 20673883. The next prime is 20673907. The reversal of 20673893 is 39837602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12159169 + 8514724 = 3487^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 20673893 - 2²⁴ = 3896677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20673823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336946 + 10336947.

It is an arithmetic number, because the mean of its divisors is an integer number (10336947).

Almost surely, 2^20673893 is an apocalyptic number.

It is an amenable number.

20673893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20673893 is an equidigital number, since it uses as much as digits as its factorization.

20673893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20673893 is about 4546.8552868988. The cubic root of 20673893 is about 274.4568585479.

The spelling of 20673893 in words is "twenty million, six hundred seventy-three thousand, eight hundred ninety-three".