20848543 has 2 divisors, whose sum is σ = 20848544. Its totient is φ = 20848542.

The previous prime is 20848489. The next prime is 20848547. The reversal of 20848543 is 34584802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20848543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20848499 and 20848508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20848547) 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, 10424271 + 10424272.

It is an arithmetic number, because the mean of its divisors is an integer number (10424272).

Almost surely, 2^20848543 is an apocalyptic number.

20848543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20848543 is an equidigital number, since it uses as much as digits as its factorization.

20848543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 20848543 is about 4566.0204773960. The cubic root of 20848543 is about 275.2275494028.

The spelling of 20848543 in words is "twenty million, eight hundred forty-eight thousand, five hundred forty-three".