20896243 has 2 divisors, whose sum is σ = 20896244. Its totient is φ = 20896242.

The previous prime is 20896171. The next prime is 20896273. The reversal of 20896243 is 34269802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20896243 - 2²¹ = 18799091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20896199 and 20896208.

It is not a weakly prime, because it can be changed into another prime (20896273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10448121 + 10448122.

It is an arithmetic number, because the mean of its divisors is an integer number (10448122).

Almost surely, 2^20896243 is an apocalyptic number.

20896243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20896243 is an equidigital number, since it uses as much as digits as its factorization.

20896243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20896243 is about 4571.2408599854. The cubic root of 20896243 is about 275.4372899518.

The spelling of 20896243 in words is "twenty million, eight hundred ninety-six thousand, two hundred forty-three".