20534603 has 2 divisors, whose sum is σ = 20534604. Its totient is φ = 20534602.

The previous prime is 20534597. The next prime is 20534669. The reversal of 20534603 is 30643502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20534603 - 2⁶ = 20534539 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20534303) 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, 10267301 + 10267302.

It is an arithmetic number, because the mean of its divisors is an integer number (10267302).

Almost surely, 2^20534603 is an apocalyptic number.

20534603 is a deficient number, since it is larger than the sum of its proper divisors (1).

20534603 is an equidigital number, since it uses as much as digits as its factorization.

20534603 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 20534603 is about 4531.5122199990. The cubic root of 20534603 is about 273.8390862589.

The spelling of 20534603 in words is "twenty million, five hundred thirty-four thousand, six hundred three".