20392243 has 2 divisors, whose sum is σ = 20392244. Its totient is φ = 20392242.

The previous prime is 20392241. The next prime is 20392247. The reversal of 20392243 is 34229302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20392243 - 2¹ = 20392241 is a prime.

Together with 20392241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20392241) 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, 10196121 + 10196122.

It is an arithmetic number, because the mean of its divisors is an integer number (10196122).

Almost surely, 2^20392243 is an apocalyptic number.

20392243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20392243 is an equidigital number, since it uses as much as digits as its factorization.

20392243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20392243 is about 4515.7771202751. Note that the first 3 decimals coincide. The cubic root of 20392243 is about 273.2048045661.

The spelling of 20392243 in words is "twenty million, three hundred ninety-two thousand, two hundred forty-three".