20709027 has 10 divisors (see below), whose sum is σ = 30935828. Its totient is φ = 13805964.

The previous prime is 20708971. The next prime is 20709041. The reversal of 20709027 is 72090702.

It is not a de Polignac number, because 20709027 - 2²⁰ = 19660451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20709127) 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 9 ways as a sum of consecutive naturals, for example, 127753 + ... + 127914.

Almost surely, 2^20709027 is an apocalyptic number.

20709027 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20709027 is a deficient number, since it is larger than the sum of its proper divisors (10226801).

20709027 is an equidigital number, since it uses as much as digits as its factorization.

20709027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255679 (or 255670 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 20709027 is about 4550.7171962230. The cubic root of 20709027 is about 274.6122446991.

Adding to 20709027 its reverse (72090702), we get a palindrome (92799729).

The spelling of 20709027 in words is "twenty million, seven hundred nine thousand, twenty-seven".