20406107 has 2 divisors, whose sum is σ = 20406108. Its totient is φ = 20406106.

The previous prime is 20406017. The next prime is 20406109. The reversal of 20406107 is 70160402.

Together with previous prime (20406017) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20406107 is a prime.

Together with 20406109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20406109) 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 as a sum of consecutive naturals, namely, 10203053 + 10203054.

It is an arithmetic number, because the mean of its divisors is an integer number (10203054).

Almost surely, 2^20406107 is an apocalyptic number.

20406107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20406107 is an equidigital number, since it uses as much as digits as its factorization.

20406107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20406107 is about 4517.3119219288. The cubic root of 20406107 is about 273.2667047922.

Adding to 20406107 its reverse (70160402), we get a palindrome (90566509).

The spelling of 20406107 in words is "twenty million, four hundred six thousand, one hundred seven".