25540013203 has 4 divisors (see below), whose sum is σ = 25634957760. Its totient is φ = 25445068648.

The previous prime is 25540013153. The next prime is 25540013207. The reversal of 25540013203 is 30231004552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25540013203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25540013207) 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, 47471875 + ... + 47472412.

It is an arithmetic number, because the mean of its divisors is an integer number (6408739440).

Almost surely, 2^25540013203 is an apocalyptic number.

25540013203 is a deficient number, since it is larger than the sum of its proper divisors (94944557).

25540013203 is an equidigital number, since it uses as much as digits as its factorization.

25540013203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94944556.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 25540013203 its reverse (30231004552), we get a palindrome (55771017755).

The spelling of 25540013203 in words is "twenty-five billion, five hundred forty million, thirteen thousand, two hundred three".