20850003 has 6 divisors (see below), whose sum is σ = 30116684. Its totient is φ = 13899996.

The previous prime is 20850001. The next prime is 20850019. The reversal of 20850003 is 30005802.

It is not a de Polignac number, because 20850003 - 2¹ = 20850001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20850001) 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, 1158325 + ... + 1158342.

Almost surely, 2^20850003 is an apocalyptic number.

20850003 is a deficient number, since it is larger than the sum of its proper divisors (9266681).

20850003 is a wasteful number, since it uses less digits than its factorization.

20850003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316673 (or 2316670 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20850003 is about 4566.1803512345. The cubic root of 20850003 is about 275.2339738780.

Adding to 20850003 its reverse (30005802), we get a palindrome (50855805).

The spelling of 20850003 in words is "twenty million, eight hundred fifty thousand, three".