25430000005 has 4 divisors (see below), whose sum is σ = 30516000012. Its totient is φ = 20344000000.

The previous prime is 25430000003. The next prime is 25430000027. The reversal of 25430000005 is 50000003452.

It is a happy number.

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 3753032644 + 21676967361 = 61262^2 + 147231^2 .

It is not a de Polignac number, because 25430000005 - 2¹ = 25430000003 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 (25430000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542999996 + ... + 2543000005.

It is an arithmetic number, because the mean of its divisors is an integer number (7629000003).

Almost surely, 2^25430000005 is an apocalyptic number.

It is an amenable number.

25430000005 is a deficient number, since it is larger than the sum of its proper divisors (5086000007).

25430000005 is an equidigital number, since it uses as much as digits as its factorization.

25430000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086000006.

The product of its (nonzero) digits is 600, while the sum is 19.

Adding to 25430000005 its reverse (50000003452), we get a palindrome (75430003457).

The spelling of 25430000005 in words is "twenty-five billion, four hundred thirty million, five", and thus it is an aban number.