20503463 has 2 divisors, whose sum is σ = 20503464. Its totient is φ = 20503462.

The previous prime is 20503459. The next prime is 20503481. The reversal of 20503463 is 36430502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20503463 - 2² = 20503459 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20503433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251731 + 10251732.

It is an arithmetic number, because the mean of its divisors is an integer number (10251732).

Almost surely, 2^20503463 is an apocalyptic number.

20503463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20503463 is an equidigital number, since it uses as much as digits as its factorization.

20503463 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 20503463 is about 4528.0749772944. The cubic root of 20503463 is about 273.7005937957.

Adding to 20503463 its reverse (36430502), we get a palindrome (56933965).

The spelling of 20503463 in words is "twenty million, five hundred three thousand, four hundred sixty-three".