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20332321 = 38353087
BaseRepresentation
bin100110110001…
…1111100100001
31102020222200221
41031203330201
520201113241
62003443041
7334551622
oct115437441
942228627
1020332321
1110527a79
126986481
13429b779
1429b3a49
151bb95d1
hex1363f21

20332321 has 4 divisors (see below), whose sum is σ = 20385792. Its totient is φ = 20278852.

The previous prime is 20332313. The next prime is 20332327. The reversal of 20332321 is 12323302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12323302 = 26161651.

It is a cyclic number.

It is not a de Polignac number, because 20332321 - 23 = 20332313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20332295 and 20332304.

It is not an unprimeable number, because it can be changed into a prime (20332327) 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, 26161 + ... + 26926.

It is an arithmetic number, because the mean of its divisors is an integer number (5096448).

Almost surely, 220332321 is an apocalyptic number.

It is an amenable number.

20332321 is a deficient number, since it is larger than the sum of its proper divisors (53471).

20332321 is an equidigital number, since it uses as much as digits as its factorization.

20332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53470.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20332321 is about 4509.1375006757. The cubic root of 20332321 is about 272.9369406249.

Adding to 20332321 its reverse (12323302), we get a palindrome (32655623).

The spelling of 20332321 in words is "twenty million, three hundred thirty-two thousand, three hundred twenty-one".

Divisors: 1 383 53087 20332321