25003320 has 64 divisors (see below), whose sum is σ = 75600000. Its totient is φ = 6615168.

The previous prime is 25003301. The next prime is 25003327. The reversal of 25003320 is 2330052.

It is a super-2 number, since 2×25003320² = 1250332022044800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 25003320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25003327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15931 + ... + 17429.

It is an arithmetic number, because the mean of its divisors is an integer number (1181250).

Almost surely, 2^25003320 is an apocalyptic number.

25003320 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 25003320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37800000).

25003320 is an abundant number, since it is smaller than the sum of its proper divisors (50596680).

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

25003320 is a wasteful number, since it uses less digits than its factorization.

25003320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 25003320 is about 5000.3319889783. The cubic root of 25003320 is about 292.4147169002.

Adding to 25003320 its reverse (2330052), we get a palindrome (27333372).

The spelling of 25003320 in words is "twenty-five million, three thousand, three hundred twenty".