20124503 has 4 divisors (see below), whose sum is σ = 22999440. Its totient is φ = 17249568.

The previous prime is 20124491. The next prime is 20124523. The reversal of 20124503 is 30542102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30542102 = 2 ⋅15271051.

It is not a de Polignac number, because 20124503 - 2¹⁰ = 20123479 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 (20124523) 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, 1437458 + ... + 1437471.

It is an arithmetic number, because the mean of its divisors is an integer number (5749860).

Almost surely, 2^20124503 is an apocalyptic number.

20124503 is a deficient number, since it is larger than the sum of its proper divisors (2874937).

20124503 is an equidigital number, since it uses as much as digits as its factorization.

20124503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874936.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20124503 is about 4486.0342174353. The cubic root of 20124503 is about 272.0038521297.

Adding to 20124503 its reverse (30542102), we get a palindrome (50666605).

The spelling of 20124503 in words is "twenty million, one hundred twenty-four thousand, five hundred three".