25371828820 has 96 divisors (see below), whose sum is σ = 58447571616. Its totient is φ = 9194342400.

The previous prime is 25371828751. The next prime is 25371828851. The reversal of 25371828820 is 2882817352.

It can be written as a sum of positive squares in 16 ways, for example, as 21735015184 + 3636813636 = 147428^2 + 60306^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8578782 + ... + 8581738.

It is an arithmetic number, because the mean of its divisors is an integer number (608828871).

Almost surely, 2^25371828820 is an apocalyptic number.

25371828820 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 25371828820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29223785808).

25371828820 is an abundant number, since it is smaller than the sum of its proper divisors (33075742796).

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

25371828820 is a wasteful number, since it uses less digits than its factorization.

25371828820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 25371828820 in words is "twenty-five billion, three hundred seventy-one million, eight hundred twenty-eight thousand, eight hundred twenty".