20684327 has 4 divisors (see below), whose sum is σ = 20693640. Its totient is φ = 20675016.

The previous prime is 20684317. The next prime is 20684341. The reversal of 20684327 is 72348602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20684327 - 2⁶ = 20684263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20684293 and 20684302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20684317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (5173410).

Almost surely, 2^20684327 is an apocalyptic number.

20684327 is a deficient number, since it is larger than the sum of its proper divisors (9313).

20684327 is an equidigital number, since it uses as much as digits as its factorization.

20684327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9312.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20684327 is about 4548.0025285833. The cubic root of 20684327 is about 274.5030230710.

The spelling of 20684327 in words is "twenty million, six hundred eighty-four thousand, three hundred twenty-seven".