20478303 has 12 divisors (see below), whose sum is σ = 30866160. Its totient is φ = 13058496.

The previous prime is 20478287. The next prime is 20478329. The reversal of 20478303 is 30387402.

It is not a de Polignac number, because 20478303 - 2⁴ = 20478287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20478373) 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, 49258 + ... + 49671.

It is an arithmetic number, because the mean of its divisors is an integer number (2572180).

Almost surely, 2^20478303 is an apocalyptic number.

20478303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20478303 is a deficient number, since it is larger than the sum of its proper divisors (10387857).

20478303 is a wasteful number, since it uses less digits than its factorization.

20478303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98958 (or 98955 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20478303 is about 4525.2959019273. The cubic root of 20478303 is about 273.5885944127.

Subtracting 20478303 from its reverse (30387402), we obtain a palindrome (9909099).

The spelling of 20478303 in words is "twenty million, four hundred seventy-eight thousand, three hundred three".