20711107 has 4 divisors (see below), whose sum is σ = 21020296. Its totient is φ = 20401920.

The previous prime is 20711099. The next prime is 20711123. The reversal of 20711107 is 70111702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70111702 = 2 ⋅35055851.

It is a cyclic number.

It is not a de Polignac number, because 20711107 - 2³ = 20711099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20711167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154494 + ... + 154627.

It is an arithmetic number, because the mean of its divisors is an integer number (5255074).

Almost surely, 2^20711107 is an apocalyptic number.

20711107 is a deficient number, since it is larger than the sum of its proper divisors (309189).

20711107 is an equidigital number, since it uses as much as digits as its factorization.

20711107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309188.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 20711107 is about 4550.9457258904. The cubic root of 20711107 is about 274.6214383444.

Adding to 20711107 its reverse (70111702), we get a palindrome (90822809).

The spelling of 20711107 in words is "twenty million, seven hundred eleven thousand, one hundred seven".