20404103 has 4 divisors (see below), whose sum is σ = 20434920. Its totient is φ = 20373288.

The previous prime is 20404093. The next prime is 20404123. The reversal of 20404103 is 30140402.

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

It is a cyclic number.

It is not a de Polignac number, because 20404103 - 2⁶ = 20404039 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 (20404123) 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, 14393 + ... + 15746.

It is an arithmetic number, because the mean of its divisors is an integer number (5108730).

Almost surely, 2^20404103 is an apocalyptic number.

20404103 is a deficient number, since it is larger than the sum of its proper divisors (30817).

20404103 is an equidigital number, since it uses as much as digits as its factorization.

20404103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30816.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20404103 is about 4517.0901031527. The cubic root of 20404103 is about 273.2577590323.

Adding to 20404103 its reverse (30140402), we get a palindrome (50544505).

The spelling of 20404103 in words is "twenty million, four hundred four thousand, one hundred three".