20024905 has 8 divisors (see below), whose sum is σ = 24136200. Its totient is φ = 15949056.

The previous prime is 20024887. The next prime is 20024959. The reversal of 20024905 is 50942002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 831744 + 19193161 = 912^2 + 4381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20024905 - 2¹³ = 20016713 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7600 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (3017025).

Almost surely, 2^20024905 is an apocalyptic number.

It is an amenable number.

20024905 is a deficient number, since it is larger than the sum of its proper divisors (4111295).

20024905 is a wasteful number, since it uses less digits than its factorization.

20024905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17723.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20024905 is about 4474.9195523495. The cubic root of 20024905 is about 271.5543858752.

Adding to 20024905 its product of nonzero digits (720), we get a square (20025625 = 4475²).

Adding to 20024905 its reverse (50942002), we get a palindrome (70966907).

The spelling of 20024905 in words is "twenty million, twenty-four thousand, nine hundred five".