20544343 has 2 divisors, whose sum is σ = 20544344. Its totient is φ = 20544342.

The previous prime is 20544341. The next prime is 20544389. The reversal of 20544343 is 34344502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20544343 - 2¹ = 20544341 is a prime.

Together with 20544341, it forms a pair of twin primes.

It is equal to p_1302892 and since 20544343 and 1302892 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20544341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272171 + 10272172.

It is an arithmetic number, because the mean of its divisors is an integer number (10272172).

Almost surely, 2^20544343 is an apocalyptic number.

20544343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20544343 is an equidigital number, since it uses as much as digits as its factorization.

20544343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 20544343 is about 4532.5867890202. The cubic root of 20544343 is about 273.8823753210.

Adding to 20544343 its reverse (34344502), we get a palindrome (54888845).

The spelling of 20544343 in words is "twenty million, five hundred forty-four thousand, three hundred forty-three".