20670303 has 4 divisors (see below), whose sum is σ = 27560408. Its totient is φ = 13780200.

The previous prime is 20670263. The next prime is 20670311. The reversal of 20670303 is 30307602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20670303 - 2⁸ = 20670047 is a prime.

It is a super-2 number, since 2×20670303² = 854522852223618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20670303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670313) 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 in 3 ways as a sum of consecutive naturals, for example, 3445048 + ... + 3445053.

It is an arithmetic number, because the mean of its divisors is an integer number (6890102).

Almost surely, 2^20670303 is an apocalyptic number.

20670303 is a deficient number, since it is larger than the sum of its proper divisors (6890105).

20670303 is an equidigital number, since it uses as much as digits as its factorization.

20670303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890104.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20670303 is about 4546.4604914153. The cubic root of 20670303 is about 274.4409712456.

Adding to 20670303 its reverse (30307602), we get a palindrome (50977905).

The spelling of 20670303 in words is "twenty million, six hundred seventy thousand, three hundred three".