20452843 has 2 divisors, whose sum is σ = 20452844. Its totient is φ = 20452842.

The previous prime is 20452837. The next prime is 20452871. The reversal of 20452843 is 34825402.

It is an a-pointer prime, because the next prime (20452871) can be obtained adding 20452843 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20452843 - 2⁵ = 20452811 is a prime.

It is not a weakly prime, because it can be changed into another prime (20452643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226421 + 10226422.

It is an arithmetic number, because the mean of its divisors is an integer number (10226422).

Almost surely, 2^20452843 is an apocalyptic number.

20452843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20452843 is an equidigital number, since it uses as much as digits as its factorization.

20452843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 20452843 is about 4522.4819513183. The cubic root of 20452843 is about 273.4751661614.

The spelling of 20452843 in words is "twenty million, four hundred fifty-two thousand, eight hundred forty-three".