20680207 has 2 divisors, whose sum is σ = 20680208. Its totient is φ = 20680206.

The previous prime is 20680199. The next prime is 20680213. The reversal of 20680207 is 70208602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20680207 - 2³ = 20680199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20680217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10340103 + 10340104.

It is an arithmetic number, because the mean of its divisors is an integer number (10340104).

Almost surely, 2^20680207 is an apocalyptic number.

20680207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20680207 is an equidigital number, since it uses as much as digits as its factorization.

20680207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20680207 is about 4547.5495599279. The cubic root of 20680207 is about 274.4847962665.

Adding to 20680207 its reverse (70208602), we get a palindrome (90888809).

The spelling of 20680207 in words is "twenty million, six hundred eighty thousand, two hundred seven".