20563343 has 2 divisors, whose sum is σ = 20563344. Its totient is φ = 20563342.

The previous prime is 20563337. The next prime is 20563351. The reversal of 20563343 is 34336502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20563343 - 2⁴ = 20563327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20563313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10281671 + 10281672.

It is an arithmetic number, because the mean of its divisors is an integer number (10281672).

Almost surely, 2^20563343 is an apocalyptic number.

20563343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20563343 is an equidigital number, since it uses as much as digits as its factorization.

20563343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 20563343 is about 4534.6822380405. The cubic root of 20563343 is about 273.9667807419.

Adding to 20563343 its reverse (34336502), we get a palindrome (54899845).

The spelling of 20563343 in words is "twenty million, five hundred sixty-three thousand, three hundred forty-three".