20124530 has 16 divisors (see below), whose sum is σ = 36333144. Its totient is φ = 8025600.

The previous prime is 20124529. The next prime is 20124551. The reversal of 20124530 is 3542102.

It can be written as a sum of positive squares in 4 ways, for example, as 18156121 + 1968409 = 4261^2 + 1403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20124499 and 20124508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 6380.

Almost surely, 2^20124530 is an apocalyptic number.

20124530 is a deficient number, since it is larger than the sum of its proper divisors (16208614).

20124530 is a wasteful number, since it uses less digits than its factorization.

20124530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061.

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

The square root of 20124530 is about 4486.0372267738. The cubic root of 20124530 is about 272.0039737741.

Adding to 20124530 its reverse (3542102), we get a palindrome (23666632).

The spelling of 20124530 in words is "twenty million, one hundred twenty-four thousand, five hundred thirty".