20830243 has 6 divisors (see below), whose sum is σ = 24231156. Its totient is φ = 17854452.

The previous prime is 20830241. The next prime is 20830247. The reversal of 20830243 is 34203802.

It is not a de Polignac number, because 20830243 - 2¹ = 20830241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20830241) 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 5 ways as a sum of consecutive naturals, for example, 212505 + ... + 212602.

It is an arithmetic number, because the mean of its divisors is an integer number (4038526).

Almost surely, 2^20830243 is an apocalyptic number.

20830243 is a deficient number, since it is larger than the sum of its proper divisors (3400913).

20830243 is an equidigital number, since it uses as much as digits as its factorization.

20830243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425121 (or 425114 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20830243 is about 4564.0161042661. The cubic root of 20830243 is about 275.1469979940.

The spelling of 20830243 in words is "twenty million, eight hundred thirty thousand, two hundred forty-three".