20684127 has 8 divisors (see below), whose sum is σ = 27633664. Its totient is φ = 13762008.

The previous prime is 20684117. The next prime is 20684143. The reversal of 20684127 is 72148602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20684127 - 2²³ = 12295519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20684094 and 20684103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20684117) 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 7 ways as a sum of consecutive naturals, for example, 5023 + ... + 8160.

It is an arithmetic number, because the mean of its divisors is an integer number (3454208).

Almost surely, 2^20684127 is an apocalyptic number.

20684127 is a deficient number, since it is larger than the sum of its proper divisors (6949537).

20684127 is a wasteful number, since it uses less digits than its factorization.

20684127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13709.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20684127 is about 4547.9805408555. The cubic root of 20684127 is about 274.5021383306.

The spelling of 20684127 in words is "twenty million, six hundred eighty-four thousand, one hundred twenty-seven".