20924005 has 8 divisors (see below), whose sum is σ = 25154712. Its totient is φ = 16708608.

The previous prime is 20924003. The next prime is 20924011. The reversal of 20924005 is 50042902.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9941409 + 10982596 = 3153^2 + 3314^2 .

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 20924005 - 2¹ = 20924003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20924003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (3144339).

Almost surely, 2^20924005 is an apocalyptic number.

It is an amenable number.

20924005 is a deficient number, since it is larger than the sum of its proper divisors (4230707).

20924005 is an equidigital number, since it uses as much as digits as its factorization.

20924005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655.

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

The square root of 20924005 is about 4574.2764455157. The cubic root of 20924005 is about 275.5592146788.

Adding to 20924005 its reverse (50042902), we get a palindrome (70966907).

The spelling of 20924005 in words is "twenty million, nine hundred twenty-four thousand, five".