20670503 has 6 divisors (see below), whose sum is σ = 24045336. Its totient is φ = 17717532.

The previous prime is 20670497. The next prime is 20670509. The reversal of 20670503 is 30507602.

It is an interprime number because it is at equal distance from previous prime (20670497) and next prime (20670509).

It is not a de Polignac number, because 20670503 - 2²⁴ = 3893287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670509) 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 in 5 ways as a sum of consecutive naturals, for example, 210875 + ... + 210972.

It is an arithmetic number, because the mean of its divisors is an integer number (4007556).

Almost surely, 2^20670503 is an apocalyptic number.

20670503 is a deficient number, since it is larger than the sum of its proper divisors (3374833).

20670503 is an equidigital number, since it uses as much as digits as its factorization.

20670503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421861 (or 421854 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20670503 is about 4546.4824864944. The cubic root of 20670503 is about 274.4418563805.

The spelling of 20670503 in words is "twenty million, six hundred seventy thousand, five hundred three".