20024545 has 4 divisors (see below), whose sum is σ = 24029460. Its totient is φ = 16019632.

The previous prime is 20024527. The next prime is 20024549. The reversal of 20024545 is 54542002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14930496 + 5094049 = 3864^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 20024545 - 2²³ = 11635937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20024549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002450 + ... + 2002459.

It is an arithmetic number, because the mean of its divisors is an integer number (6007365).

Almost surely, 2^20024545 is an apocalyptic number.

It is an amenable number.

20024545 is a deficient number, since it is larger than the sum of its proper divisors (4004915).

20024545 is an equidigital number, since it uses as much as digits as its factorization.

20024545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004914.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20024545 is about 4474.8793279819. The cubic root of 20024545 is about 271.5527585655.

Adding to 20024545 its reverse (54542002), we get a palindrome (74566547).

The spelling of 20024545 in words is "twenty million, twenty-four thousand, five hundred forty-five".