20825103 has 16 divisors (see below), whose sum is σ = 30935520. Its totient is φ = 12372864.

The previous prime is 20825099. The next prime is 20825177. The reversal of 20825103 is 30152802.

It is not a de Polignac number, because 20825103 - 2² = 20825099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20825103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825003) 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 15 ways as a sum of consecutive naturals, for example, 8076 + ... + 10337.

It is an arithmetic number, because the mean of its divisors is an integer number (1933470).

Almost surely, 2^20825103 is an apocalyptic number.

20825103 is a deficient number, since it is larger than the sum of its proper divisors (10110417).

20825103 is a wasteful number, since it uses less digits than its factorization.

20825103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18458.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20825103 is about 4563.4529689699. The cubic root of 20825103 is about 275.1243646861.

Adding to 20825103 its reverse (30152802), we get a palindrome (50977905).

The spelling of 20825103 in words is "twenty million, eight hundred twenty-five thousand, one hundred three".