20706107 has 4 divisors (see below), whose sum is σ = 21211176. Its totient is φ = 20201040.

The previous prime is 20706071. The next prime is 20706121. The reversal of 20706107 is 70160702.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20706107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20706167) 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, 252473 + ... + 252554.

It is an arithmetic number, because the mean of its divisors is an integer number (5302794).

Almost surely, 2^20706107 is an apocalyptic number.

20706107 is a deficient number, since it is larger than the sum of its proper divisors (505069).

20706107 is an equidigital number, since it uses as much as digits as its factorization.

20706107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505068.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 20706107 is about 4550.3963563628. The cubic root of 20706107 is about 274.5993371967.

Adding to 20706107 its reverse (70160702), we get a palindrome (90866809).

The spelling of 20706107 in words is "twenty million, seven hundred six thousand, one hundred seven".