24990005 has 4 divisors (see below), whose sum is σ = 29988012. Its totient is φ = 19992000.

The previous prime is 24989971. The next prime is 24990037. The reversal of 24990005 is 50009942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50009942 = 2 ⋅25004971.

It can be written as a sum of positive squares in 2 ways, for example, as 9006001 + 15984004 = 3001^2 + 3998^2 .

It is not a de Polignac number, because 24990005 - 2¹⁸ = 24727861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 24990005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2498996 + ... + 2499005.

It is an arithmetic number, because the mean of its divisors is an integer number (7497003).

Almost surely, 2^24990005 is an apocalyptic number.

It is an amenable number.

24990005 is a deficient number, since it is larger than the sum of its proper divisors (4998007).

24990005 is an equidigital number, since it uses as much as digits as its factorization.

24990005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998006.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 24990005 is about 4999.0004000800. Note that the first 3 decimals coincide. The cubic root of 24990005 is about 292.3628012174.

Adding to 24990005 its reverse (50009942), we get a palindrome (74999947).

The spelling of 24990005 in words is "twenty-four million, nine hundred ninety thousand, five".