25303520 has 72 divisors (see below), whose sum is σ = 65758392. Its totient is φ = 9194240.

The previous prime is 25303513. The next prime is 25303529. The reversal of 25303520 is 2530352.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25303492 and 25303501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25303529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18707 + ... + 20013.

It is an arithmetic number, because the mean of its divisors is an integer number (913311).

Almost surely, 2^25303520 is an apocalyptic number.

25303520 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 25303520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32879196).

25303520 is an abundant number, since it is smaller than the sum of its proper divisors (40454872).

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

25303520 is a wasteful number, since it uses less digits than its factorization.

25303520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 25303520 is about 5030.2604306338. The cubic root of 25303520 is about 293.5803474881.

Adding to 25303520 its reverse (2530352), we get a palindrome (27833872).

The spelling of 25303520 in words is "twenty-five million, three hundred three thousand, five hundred twenty".