20183321 has 2 divisors, whose sum is σ = 20183322. Its totient is φ = 20183320.

The previous prime is 20183309. The next prime is 20183327. The reversal of 20183321 is 12338102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 3667225 = 4064^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20183321 - 2¹⁰ = 20182297 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20183293 and 20183302.

It is not a weakly prime, because it can be changed into another prime (20183327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091660 + 10091661.

It is an arithmetic number, because the mean of its divisors is an integer number (10091661).

Almost surely, 2^20183321 is an apocalyptic number.

It is an amenable number.

20183321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20183321 is an equidigital number, since it uses as much as digits as its factorization.

20183321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20183321 is about 4492.5851132728. The cubic root of 20183321 is about 272.2685901179.

The spelling of 20183321 in words is "twenty million, one hundred eighty-three thousand, three hundred twenty-one".