25420252004 has 48 divisors (see below), whose sum is σ = 53155872000. Its totient is φ = 10400117376.

The previous prime is 25420251991. The next prime is 25420252007. The reversal of 25420252004 is 40025202452.

It is not an unprimeable number, because it can be changed into a prime (25420252007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289022 + ... + 366570.

It is an arithmetic number, because the mean of its divisors is an integer number (1107414000).

Almost surely, 2^25420252004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25420252004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26577936000).

25420252004 is an abundant number, since it is smaller than the sum of its proper divisors (27735619996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25420252004 is a wasteful number, since it uses less digits than its factorization.

25420252004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78092 (or 78090 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

Adding to 25420252004 its reverse (40025202452), we get a palindrome (65445454456).

The spelling of 25420252004 in words is "twenty-five billion, four hundred twenty million, two hundred fifty-two thousand, four".