20676307 has 4 divisors (see below), whose sum is σ = 21066480. Its totient is φ = 20286136.

The previous prime is 20676277. The next prime is 20676329. The reversal of 20676307 is 70367602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20676307 - 2¹⁹ = 20152019 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20676367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195007 + ... + 195112.

It is an arithmetic number, because the mean of its divisors is an integer number (5266620).

Almost surely, 2^20676307 is an apocalyptic number.

20676307 is a deficient number, since it is larger than the sum of its proper divisors (390173).

20676307 is an equidigital number, since it uses as much as digits as its factorization.

20676307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390172.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 20676307 is about 4547.1207373458. The cubic root of 20676307 is about 274.4675405075.

The spelling of 20676307 in words is "twenty million, six hundred seventy-six thousand, three hundred seven".