20665383 has 8 divisors (see below), whose sum is σ = 28140288. Its totient is φ = 13483704.

The previous prime is 20665367. The next prime is 20665433. The reversal of 20665383 is 38356602.

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

It is not a de Polignac number, because 20665383 - 2⁴ = 20665367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20665363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73141 + ... + 73422.

It is an arithmetic number, because the mean of its divisors is an integer number (3517536).

Almost surely, 2^20665383 is an apocalyptic number.

20665383 is a deficient number, since it is larger than the sum of its proper divisors (7474905).

20665383 is a wasteful number, since it uses less digits than its factorization.

20665383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146613.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 20665383 is about 4545.9193789596. The cubic root of 20665383 is about 274.4191951301.

The spelling of 20665383 in words is "twenty million, six hundred sixty-five thousand, three hundred eighty-three".