20503459 has 2 divisors, whose sum is σ = 20503460. Its totient is φ = 20503458.

The previous prime is 20503453. The next prime is 20503463. The reversal of 20503459 is 95430502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20503459 - 2⁹ = 20502947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20503453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251729 + 10251730.

It is an arithmetic number, because the mean of its divisors is an integer number (10251730).

Almost surely, 2^20503459 is an apocalyptic number.

20503459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20503459 is an equidigital number, since it uses as much as digits as its factorization.

20503459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20503459 is about 4528.0745356056. The cubic root of 20503459 is about 273.7005759970.

The spelling of 20503459 in words is "twenty million, five hundred three thousand, four hundred fifty-nine".