25025002820 has 24 divisors (see below), whose sum is σ = 52566107328. Its totient is φ = 10007410400.

The previous prime is 25025002789. The next prime is 25025002829. The reversal of 25025002820 is 2820052052.

It is a happy number.

It is a super-2 number, since 2×25025002820² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25025002820.

It is not an unprimeable number, because it can be changed into a prime (25025002829) 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 7 ways as a sum of consecutive naturals, for example, 81746 + ... + 238185.

It is an arithmetic number, because the mean of its divisors is an integer number (2190254472).

Almost surely, 2^25025002820 is an apocalyptic number.

25025002820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25025002820 is an abundant number, since it is smaller than the sum of its proper divisors (27541104508).

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

25025002820 is a wasteful number, since it uses less digits than its factorization.

25025002820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323851 (or 323849 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 25025002820 its reverse (2820052052), we get a palindrome (27845054872).

The spelling of 25025002820 in words is "twenty-five billion, twenty-five million, two thousand, eight hundred twenty".