20453103 has 12 divisors (see below), whose sum is σ = 32229288. Its totient is φ = 12395760.

The previous prime is 20453099. The next prime is 20453123. The reversal of 20453103 is 30135402.

It is not a de Polignac number, because 20453103 - 2² = 20453099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103200 + ... + 103397.

It is an arithmetic number, because the mean of its divisors is an integer number (2685774).

Almost surely, 2^20453103 is an apocalyptic number.

20453103 is a deficient number, since it is larger than the sum of its proper divisors (11776185).

20453103 is a wasteful number, since it uses less digits than its factorization.

20453103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206614 (or 206611 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20453103 is about 4522.5106965048. The cubic root of 20453103 is about 273.4763249774.

Adding to 20453103 its reverse (30135402), we get a palindrome (50588505).

The spelling of 20453103 in words is "twenty million, four hundred fifty-three thousand, one hundred three".