20243504 has 20 divisors (see below), whose sum is σ = 40179720. Its totient is φ = 9874560.

The previous prime is 20243501. The next prime is 20243507. The reversal of 20243504 is 40534202.

It is an interprime number because it is at equal distance from previous prime (20243501) and next prime (20243507).

It is not an unprimeable number, because it can be changed into a prime (20243501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14774 + ... + 16085.

It is an arithmetic number, because the mean of its divisors is an integer number (2008986).

Almost surely, 2^20243504 is an apocalyptic number.

It is an amenable number.

20243504 is a deficient number, since it is larger than the sum of its proper divisors (19936216).

20243504 is a wasteful number, since it uses less digits than its factorization.

20243504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30908 (or 30902 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20243504 is about 4499.2781643281. The cubic root of 20243504 is about 272.5389400907.

Adding to 20243504 its reverse (40534202), we get a palindrome (60777706).

The spelling of 20243504 in words is "twenty million, two hundred forty-three thousand, five hundred four".