20403103 has 8 divisors (see below), whose sum is σ = 23347872. Its totient is φ = 17465856.

The previous prime is 20403083. The next prime is 20403121. The reversal of 20403103 is 30130402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20403103 is a prime.

It is a super-2 number, since 2×20403103² = 832573224057218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6351 + ... + 9007.

It is an arithmetic number, because the mean of its divisors is an integer number (2918484).

Almost surely, 2^20403103 is an apocalyptic number.

20403103 is a deficient number, since it is larger than the sum of its proper divisors (2944769).

20403103 is a wasteful number, since it uses less digits than its factorization.

20403103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20403103 is about 4516.9794110666. The cubic root of 20403103 is about 273.2532948611.

Adding to 20403103 its reverse (30130402), we get a palindrome (50533505).

The spelling of 20403103 in words is "twenty million, four hundred three thousand, one hundred three".