20356043 has 2 divisors, whose sum is σ = 20356044. Its totient is φ = 20356042.

The previous prime is 20356033. The next prime is 20356051. The reversal of 20356043 is 34065302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20356043 - 2⁴ = 20356027 is a prime.

It is not a weakly prime, because it can be changed into another prime (20356013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178021 + 10178022.

It is an arithmetic number, because the mean of its divisors is an integer number (10178022).

Almost surely, 2^20356043 is an apocalyptic number.

20356043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20356043 is an equidigital number, since it uses as much as digits as its factorization.

20356043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20356043 is about 4511.7671704112. The cubic root of 20356043 is about 273.0430458048.

The spelling of 20356043 in words is "twenty million, three hundred fifty-six thousand, forty-three".