20328283 has 4 divisors (see below), whose sum is σ = 20347600. Its totient is φ = 20308968.

The previous prime is 20328257. The next prime is 20328307. The reversal of 20328283 is 38282302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20328283 - 2¹⁷ = 20197211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20328083) 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, 7983 + ... + 10216.

It is an arithmetic number, because the mean of its divisors is an integer number (5086900).

Almost surely, 2^20328283 is an apocalyptic number.

20328283 is a deficient number, since it is larger than the sum of its proper divisors (19317).

20328283 is a wasteful number, since it uses less digits than its factorization.

20328283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19316.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20328283 is about 4508.6897209722. The cubic root of 20328283 is about 272.9188709985.

The spelling of 20328283 in words is "twenty million, three hundred twenty-eight thousand, two hundred eighty-three".