25305105320 has 128 divisors (see below), whose sum is σ = 64217318400. Its totient is φ = 8890982400.

The previous prime is 25305105269. The next prime is 25305105323. The reversal of 25305105320 is 2350150352.

It is a self number, because there is not a number n which added to its sum of digits gives 25305105320.

It is not an unprimeable number, because it can be changed into a prime (25305105323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12670562 + ... + 12672558.

It is an arithmetic number, because the mean of its divisors is an integer number (501697800).

Almost surely, 2^25305105320 is an apocalyptic number.

25305105320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25305105320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32108659200).

25305105320 is an abundant number, since it is smaller than the sum of its proper divisors (38912213080).

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

25305105320 is a wasteful number, since it uses less digits than its factorization.

25305105320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979 (or 2975 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

Adding to 25305105320 its reverse (2350150352), we get a palindrome (27655255672).

The spelling of 25305105320 in words is "twenty-five billion, three hundred five million, one hundred five thousand, three hundred twenty".