20530383 has 4 divisors (see below), whose sum is σ = 27373848. Its totient is φ = 13686920.

The previous prime is 20530351. The next prime is 20530397. The reversal of 20530383 is 38303502.

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 20530383 - 2⁵ = 20530351 is a prime.

It is a super-2 number, since 2×20530383² = 842993252253378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530313) 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 3 ways as a sum of consecutive naturals, for example, 3421728 + ... + 3421733.

It is an arithmetic number, because the mean of its divisors is an integer number (6843462).

Almost surely, 2^20530383 is an apocalyptic number.

20530383 is a deficient number, since it is larger than the sum of its proper divisors (6843465).

20530383 is an equidigital number, since it uses as much as digits as its factorization.

20530383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843464.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20530383 is about 4531.0465678472. The cubic root of 20530383 is about 273.8203263781.

Adding to 20530383 its reverse (38303502), we get a palindrome (58833885).

The spelling of 20530383 in words is "twenty million, five hundred thirty thousand, three hundred eighty-three".