20478103 has 4 divisors (see below), whose sum is σ = 20526048. Its totient is φ = 20430160.

The previous prime is 20478097. The next prime is 20478109. The reversal of 20478103 is 30187402.

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

It is an interprime number because it is at equal distance from previous prime (20478097) and next prime (20478109).

It is a cyclic number.

It is not a de Polignac number, because 20478103 - 2⁵ = 20478071 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 (20478109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23326 + ... + 24187.

It is an arithmetic number, because the mean of its divisors is an integer number (5131512).

Almost surely, 2^20478103 is an apocalyptic number.

20478103 is a deficient number, since it is larger than the sum of its proper divisors (47945).

20478103 is an equidigital number, since it uses as much as digits as its factorization.

20478103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47944.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20478103 is about 4525.2738038709. The cubic root of 20478103 is about 273.5877037481.

The spelling of 20478103 in words is "twenty million, four hundred seventy-eight thousand, one hundred three".