20834243 has 2 divisors, whose sum is σ = 20834244. Its totient is φ = 20834242.

The previous prime is 20834213. The next prime is 20834249. The reversal of 20834243 is 34243802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20834243 - 2⁸ = 20833987 is a prime.

It is not a weakly prime, because it can be changed into another prime (20834249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10417121 + 10417122.

It is an arithmetic number, because the mean of its divisors is an integer number (10417122).

Almost surely, 2^20834243 is an apocalyptic number.

20834243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20834243 is an equidigital number, since it uses as much as digits as its factorization.

20834243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 20834243 is about 4564.4542937793. The cubic root of 20834243 is about 275.1646088871.

The spelling of 20834243 in words is "twenty million, eight hundred thirty-four thousand, two hundred forty-three".