20050503 has 16 divisors (see below), whose sum is σ = 30433536. Its totient is φ = 11623040.

The previous prime is 20050493. The next prime is 20050507. The reversal of 20050503 is 30505002.

It is not a de Polignac number, because 20050503 - 2⁶ = 20050439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050507) 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 15 ways as a sum of consecutive naturals, for example, 12450 + ... + 13967.

It is an arithmetic number, because the mean of its divisors is an integer number (1902096).

Almost surely, 2^20050503 is an apocalyptic number.

20050503 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20050503 is a deficient number, since it is larger than the sum of its proper divisors (10383033).

20050503 is a wasteful number, since it uses less digits than its factorization.

20050503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26454.

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 20050503 is about 4477.7788020401. The cubic root of 20050503 is about 271.6700466707.

Adding to 20050503 its reverse (30505002), we get a palindrome (50555505).

The spelling of 20050503 in words is "twenty million, fifty thousand, five hundred three".