20313103 has 4 divisors (see below), whose sum is σ = 20343528. Its totient is φ = 20282680.

The previous prime is 20313089. The next prime is 20313119. The reversal of 20313103 is 30131302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20313103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313133) 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, 14188 + ... + 15553.

It is an arithmetic number, because the mean of its divisors is an integer number (5085882).

Almost surely, 2^20313103 is an apocalyptic number.

20313103 is a deficient number, since it is larger than the sum of its proper divisors (30425).

20313103 is an equidigital number, since it uses as much as digits as its factorization.

20313103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30424.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20313103 is about 4507.0059906772. The cubic root of 20313103 is about 272.8509206766.

Subtracting from 20313103 its product of nonzero digits (54), we obtain a square (20313049 = 4507²).

Adding to 20313103 its reverse (30131302), we get a palindrome (50444405).

The spelling of 20313103 in words is "twenty million, three hundred thirteen thousand, one hundred three".