20310103 has 4 divisors (see below), whose sum is σ = 22156488. Its totient is φ = 18463720.

The previous prime is 20310091. The next prime is 20310119. The reversal of 20310103 is 30101302.

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

It is not a de Polignac number, because 20310103 - 2⁹ = 20309591 is a prime.

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 20310103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923176 + ... + 923197.

It is an arithmetic number, because the mean of its divisors is an integer number (5539122).

Almost surely, 2^20310103 is an apocalyptic number.

20310103 is a deficient number, since it is larger than the sum of its proper divisors (1846385).

20310103 is a wasteful number, since it uses less digits than its factorization.

20310103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846384.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 20310103 is about 4506.6731632103. The cubic root of 20310103 is about 272.8374877534.

Adding to 20310103 its reverse (30101302), we get a palindrome (50411405).

The spelling of 20310103 in words is "twenty million, three hundred ten thousand, one hundred three".