20684027 has 24 divisors (see below), whose sum is σ = 27291600. Its totient is φ = 15494976.

The previous prime is 20684021. The next prime is 20684029. The reversal of 20684027 is 72048602.

It is not a de Polignac number, because 20684027 - 2⁴ = 20684011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20684021) 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 23 ways as a sum of consecutive naturals, for example, 11249 + ... + 12957.

It is an arithmetic number, because the mean of its divisors is an integer number (1137150).

Almost surely, 2^20684027 is an apocalyptic number.

20684027 is a deficient number, since it is larger than the sum of its proper divisors (6607573).

20684027 is a wasteful number, since it uses less digits than its factorization.

20684027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20684027 is about 4547.9695469517. The cubic root of 20684027 is about 274.5016959582.

The spelling of 20684027 in words is "twenty million, six hundred eighty-four thousand, twenty-seven".