20384213 has 2 divisors, whose sum is σ = 20384214. Its totient is φ = 20384212.

The previous prime is 20384209. The next prime is 20384227. The reversal of 20384213 is 31248302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19298449 + 1085764 = 4393^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 20384213 - 2² = 20384209 is a prime.

It is a super-2 number, since 2×20384213² = 831032279258738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20384263) 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 as a sum of consecutive naturals, namely, 10192106 + 10192107.

It is an arithmetic number, because the mean of its divisors is an integer number (10192107).

Almost surely, 2^20384213 is an apocalyptic number.

It is an amenable number.

20384213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20384213 is an equidigital number, since it uses as much as digits as its factorization.

20384213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20384213 is about 4514.8879277342. The cubic root of 20384213 is about 273.1689392520.

The spelling of 20384213 in words is "twenty million, three hundred eighty-four thousand, two hundred thirteen".