24840020 has 12 divisors (see below), whose sum is σ = 52164084. Its totient is φ = 9936000.

The previous prime is 24840019. The next prime is 24840029. The reversal of 24840020 is 2004842.

It can be written as a sum of positive squares in 2 ways, for example, as 10125124 + 14714896 = 3182^2 + 3836^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1242001 = 24840020 / (2 + 4 + 8 + 4 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 24839974 and 24840001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24840029) 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, 620981 + ... + 621020.

It is an arithmetic number, because the mean of its divisors is an integer number (4347007).

Almost surely, 2^24840020 is an apocalyptic number.

24840020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24840020 is an abundant number, since it is smaller than the sum of its proper divisors (27324064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

24840020 is a wasteful number, since it uses less digits than its factorization.

24840020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242010 (or 1242008 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 24840020 is about 4983.9763241813. The cubic root of 24840020 is about 291.7767261739.

Adding to 24840020 its reverse (2004842), we get a palindrome (26844862).

The spelling of 24840020 in words is "twenty-four million, eight hundred forty thousand, twenty".