20696503 has 2 divisors, whose sum is σ = 20696504. Its totient is φ = 20696502.

The previous prime is 20696483. The next prime is 20696521. The reversal of 20696503 is 30569602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20696503 - 2⁵ = 20696471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20690503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10348251 + 10348252.

It is an arithmetic number, because the mean of its divisors is an integer number (10348252).

Almost surely, 2^20696503 is an apocalyptic number.

20696503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20696503 is an equidigital number, since it uses as much as digits as its factorization.

20696503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 20696503 is about 4549.3409412793. The cubic root of 20696503 is about 274.5568753298.

The spelling of 20696503 in words is "twenty million, six hundred ninety-six thousand, five hundred three".